The Test Cut

Woodworking Glossary

Plain-language definitions of common woodworking terms.

B

Backer BoardA sacrificial piece placed behind a workpiece at the cut -- backs up the exit side of a cut so wood fibers have something to shear against instead of blowing out.BacksawA stiffened-spine saw for precise, straight joinery cuts -- the reinforcement that keeps a thin, fine-toothed blade from wandering the way an unsupported blade would.Baltic Birch PlywoodVoid-free, all-birch, all-veneer-core plywood -- the premium sheet good reached for whenever a plywood edge is going to actually show.Band Clamps (Strap Clamps)A woven strap that wraps an entire assembly and cinches tight with a ratcheting buckle -- the only practical way to clamp something round, hexagonal, or mitered from every side at once.Band SawA continuous blade looping around two or three wheels -- the only practical way to resaw thick stock into thin slices or cut a real curve.BarleycornAn old English unit -- exactly 1/3 of an inch -- that survives today only in shoe sizing, a genuine fossil of a measurement system everywhere else.BattenA narrow strip of wood used as a brace, spacer, or straightedge -- simple stock doing a supporting job rather than appearing as a finished surface.Belt SanderA continuous abrasive loop moving fast enough to remove serious material in a hurry -- the tool for leveling and stock removal, not the tool for a finish surface.Bench Cookies / Work GrippersGrippy pads that lift a workpiece off the bench and stop it sliding, so you can rout, sand or finish an edge without clamps in the way.Bench DogA peg or stop set into a workbench top -- paired with a vise or another dog to clamp a workpiece flat on the bench without a single clamp in sight.Bench PlaneThe tool on our own logo, for good reason -- shaving thin, controlled curls off a board is about as close as woodworking gets to a defining skill.BevelAn angled cut across a board's thickness -- the more dramatic cousin of a chamfer, and the one that actually changes a joint's geometry.Bird's Eye (Figure)Small, swirling dot-like figure caused by tiny, localized grain distortions -- famously associated with maple, though it can appear in other species too.BiscuitA football-shaped wafer of compressed wood that swells inside its slot once glue hits it, locking two panels in alignment.Biscuit JoineryFootball-shaped wafers of compressed wood, glued into matching slots -- less about strength than about keeping panels aligned while the clamps go on.BitThe general cutting tip a drill or router turns -- the umbrella term behind Forstner, brad-point, spade, and every other named bit type on the site.Blade GuardThe clear cover shielding a spinning blade from above -- the safety feature most often removed for a cut it genuinely can't accommodate, and the one worth putting straight back on after.Blade RunoutWobble in a spinning blade or bit -- even a few thousandths throws off cut quality and accelerates wear, and it's a machine problem, not a technique one.Blade Tilt (Left-Tilt vs. Right-Tilt)Which direction a table saw's blade leans for a bevel cut -- a real buying consideration, since it changes which side of the blade is actually safer to stand on.Blast GateA sliding plate in a dust line that opens and closes one branch -- how you send all the suction to the tool you're using, and how you stop a cyclone crushing its own bucket.Block PlaneA small, one-handed plane with its blade set bevel-up at a low angle -- built for end grain, and the plane most non-woodworkers actually own.Board FootLumber's actual unit of volume -- 144 cubic inches -- which is why a thick board costs more than a thin one even at the same width and length.Boiled Linseed OilLinseed oil chemically treated to dry in hours instead of weeks -- the classic, inexpensive penetrating finish, and a genuine spontaneous-combustion fire risk if the used rags aren't handled right.Book Matching (Slip Matching)Two consecutive veneer or resawn slices, opened like a book so their grain mirrors across the seam -- the classic symmetrical veneer layout, with slip matching as its non-mirrored cousin.BowingA board that's curved along its length like a longbow -- flat across the width, just not flat end to end.Box Joint (Finger Joint)Interlocking rectangular fingers cut across a corner -- a dovetail's strength without the angled layout, at the cost of the dovetail's mechanical pull resistance.Brad Point BitsA standard twist drill bit wanders on wood grain before it starts cutting -- a brad point bit's center spur keeps it exactly where you put it.Bridle JointAn open-sided mortise and tenon -- the tenon exposed on both edges rather than buried inside a closed mortise, trading some strength for a joint that's far easier to fit and adjust.BullnoseA full half-round profile -- effectively a roundover on both faces of an edge at once, the shape behind a stair tread's rounded front lip.BurlA tangled, chaotic growth in a tree, cut into wood with no straight grain anywhere -- prized in turning and veneer specifically for the disorder a plain board never has.Butt JointTwo flat faces pressed together and fastened -- the simplest joint there is, and honest about exactly how weak that simplicity makes it.

C

C-ClampsA C-shaped steel frame with a screw driving straight down onto the work -- high force in a small footprint, at the cost of reach.CA Glue (Cyanoacrylate)Superglue, in woodworking's context -- seconds-fast cure, genuinely strong on small glue joints, and the standard fix for stabilizing punky or spalted wood before turning.Cabriole LegA furniture leg that curves out at the knee and back in at the ankle -- the signature silhouette of Queen Anne and Chippendale furniture, cut from a single thick blank rather than bent.CambiumThe thin living layer just under a tree's bark -- where all new wood and bark actually get made, and the layer a woodworker occasionally still finds evidence of in live-edge slabs.CarbideAn extremely hard cutting material brazed onto steel blades and bits -- the reason a modern saw blade holds an edge through sheet goods that would wreck plain steel in minutes.CarcaseThe main box of a piece of case furniture -- everything before the doors, drawers, and hardware go on.Card ScraperA flat piece of steel with a deliberately rolled, burred edge -- pulled across the wood to shave gossamer-thin curls, cleaning up figured grain a plane would tear out.Carpenter SquaresA large flat L-shaped square that's less about checking 90 degrees and more about laying out stairs, rafters, and anything with a rise-over-run angle baked into it.Case HardeningA kiln-drying defect where the outer shell dries under stress the interior never relaxes from -- invisible until you rip the board and it clamps down on the blade.CaulA rigid board pressed against a glue-up to spread clamping pressure evenly -- protects the workpiece and stops clamps from denting or crushing it at each pressure point.ChamferA small flat cut across a sharp corner -- mostly there to stop the edge from splintering or biting into your hand.ChatoyanceThe shimmering, angle-dependent sheen some figured wood shows off -- the same optical trick behind a cat's-eye gemstone, here caused by wavy wood fibers instead of mineral fibers.Checks (Checking)Small surface or end-grain cracks that open up as wood dries faster than it can equalize internally -- cosmetic in small doses, a real problem at the ends of a board.Chip CarvingSmall triangular and curved cuts made with a single knife, building up a geometric pattern -- a decorative technique that needs almost no tooling beyond the knife itself.ChiselA flat, beveled blade for carving, paring, or chopping wood -- simple as tools get, and unforgiving the moment it's dull.ChuckThe jaws that grip a bit -- keyless on most drills now, keyed where a firmer grip actually matters.Circular SawThe tool most people cut their first board with, and the one that never quite leaves the shop even after you own a table saw, track saw, and miter saw.ClampA tool that holds pieces together under pressure while glue cures or a joint gets checked -- one job, and a genuinely wide family of mechanisms for doing it.Clearance HoleA hole drilled slightly larger than a screw's shank, so the screw pulls two pieces together instead of just threading into both.CleatA strip fastened to a surface to support or hang something from -- a shelf's hidden ledge, or a French cleat's interlocking wall-mount system.Climb CutFeeding a router or planer with, instead of against, the cutter's rotation -- a cleaner cut on tricky grain, and a genuine loss-of-control risk if you're not braced for it.CNC RouterA router that follows a digital file instead of a hand -- genuinely repeatable, and a real learning curve that has nothing to do with woodworking.ColletA split, tapered sleeve that clamps a bit or blade into a spinning shaft -- the connection point where runout, if there's going to be any, usually starts.Combination SquareA ruled blade sliding through an adjustable head -- checks 90 and 45 degrees, marks depth, and doubles as a basic ruler, in one tool.Compression (Wood Under Load)The stress a wood fiber experiences when it's being squeezed rather than stretched -- and why a beam's top and bottom faces are working in opposite directions under the same load.Contact AdhesiveGlue applied to both surfaces and allowed to dry before they touch -- bonds on contact with no clamping time, the standard way laminate gets applied to a substrate.Cope-and-Stick JointThe matched router-bit pair that builds a frame-and-panel door -- one cut sticks a profile onto the rails and stiles, the other copes the ends to interlock with it.Coping SawA thin, replaceable blade held in tension across a deep frame -- built to follow tight curves a bandsaw's throat can't reach or a jigsaw can't cut as cleanly.Core (Plywood Core)The interior layers of a plywood panel, hidden under the face veneer -- and the single biggest factor in how flat, strong, and screw-friendly a sheet actually is.Corner Radius TemplatesA plate with several known radii cut into it, for routing a consistent rounded corner instead of eyeballing one with a sander.CorniceA projecting molding capping a piece of furniture or a room's wall -- the finishing detail on top of a highboy or bookcase, more decorative than structural.CounterboreA wide, flat-bottomed recess drilled to sink a screw head (and often a plug) fully below the surface -- distinct from a countersink's simple conical taper.CountersinkA cone-shaped recess that lets a screw head sit flush with, or below, the surface -- instead of proud and catching on everything.CoveA concave, quarter-round-or-deeper molding profile -- the curved counterpart to a roundover, cut into an edge rather than added onto it.CrosscutA cut made across the grain, shortening a board's length -- the counterpart to a rip cut, and generally the easier, safer of the two.Crotch (Crotch Figure)The dramatic, flame-shaped grain pattern found where a trunk forks into branches -- among the most prized and least predictable figure a tree produces.CuppingA board curling across its width like a shallow trough -- the classic sign of moisture moving unevenly through flatsawn stock.Cutting ListThe itemized breakdown of every piece a project needs, with final dimensions -- the plan converted into what actually gets cut, in what order.Cyclone SeparatorA cone that spins chips out of the airstream and drops them into a bin before they ever reach your vac -- the single biggest upgrade to a shop vac, and a reliable way to crush a bucket.

D

Dado JointA slot cut across the grain that a shelf drops straight into -- the joint that makes a bookcase hold real weight without a single screw showing.Deadman (Sliding Deadman)A movable leg or support built into a workbench, used to brace long stock -- a third hand for holding the far end of a board a vise alone can't reach.Digital Angle GaugeA magnetic box that reads an angle to a tenth of a degree. The fastest way to set a saw blade to a genuine 90 or 45 rather than to whatever the factory scale claims.Dimensional LumberA 2x4 is neither 2 inches nor 4 inches -- it's 1 1/2 by 3 1/2, and that gap between the name and the tape measure isn't a defect, it's the whole system working as designed.DominosThe loose-tenon stock a Festool Domino joiner is built around -- not the tool itself, the little beech tablets that actually become the joint.Dovetail JointThe joint that shows off -- interlocking angled pins and tails strong enough to hold a corner together before a drop of glue ever touches it.Dowel JoineryRound wooden pins glued into matching drilled holes -- the oldest loose-tenon idea there is, still cheap and still strong when the holes actually line up.Dowel MakersA plate of graduated cutting holes that turns a roughly-shaped stick into a round dowel -- so offcuts of the wood you are actually using become the dowels for it.Doweling JigsHolds a drill bit square and on-centre so two boards get holes that actually line up -- the difference between dowel joinery working and dowel joinery being a nightmare.DowelsA round wooden peg, plain as it gets, and still one of the oldest reinforcement and alignment methods in the joinery toolbox.DrawknifeA two-handled blade pulled toward the body, straddling the workpiece -- fast, aggressive stock removal for green woodworking and chair-leg shaping.DrillThe tool everyone already owns, and the one most likely to be doing a job it's not actually built for -- a drill drives fasteners fine, but an impact driver does it better.Drill Guide BlocksA steel-lined block that holds a drill bit square to the surface. Not as good as a drill press, dramatically better than your wrist, and it fits in a drawer.Drill Stop CollarsA split ring that clamps to a drill bit and physically stops it going deeper. The cheapest possible insurance against drilling through the front of a finished panel.Dry Time vs. Cure TimeTwo different clocks on the same can of finish -- dry time is when it's safe to recoat or handle, cure time is when it's actually reached full hardness and durability.Dry-FitAssembling a joint or project without glue, to check the fit -- the rehearsal that catches a problem while it's still fixable, instead of during a real, glue-committed glue-up.Dust CollectorMachine-level dust extraction, not a shop vacuum -- the difference is airflow volume, and it's the difference between a clean shop and one coated in fine dust.Dust Mask and Ear Protection (Shop PPE)The two most commonly skipped pieces of shop safety gear -- both protecting against damage you won't notice happening in the moment, only years later.

F

F-ClampsThe clamp most people actually picture when they hear the word -- a fixed foot at one end of a bar, a jaw that slides freely and locks near the work, tightened with a screw handle.Face FrameA solid-wood frame applied to a plywood carcase's front -- hides the sheet-good edges, and gives doors and drawers a real, screwable structure to hang from.Face GrainA board's wide flat face -- the surface most furniture actually shows, and the one that gets called flatsawn or quartersawn.FeatherboardA comb of flexible fingers that presses stock against a fence or table -- constant, spring-loaded pressure instead of a hand that can slip toward a spinning blade.FerruleThe metal band around a tool handle where the blade meets the wood -- there to stop the handle from splitting under the exact force the tool is designed to take.Festool DominoA loose-tenon joiner that cuts a matched mortise in seconds -- the tool that made mortise-and-tenon joinery fast enough to actually use on everyday projects.FigureThe decorative visual pattern in a board -- curl, quilt, burl -- layered on top of, and distinct from, its plain grain direction.FilletA small flat step between two other profiles or surfaces -- a deliberate pause in a molding's shape, not an accident of the cut.Fillister PlaneA specialized hand plane built specifically to cut a rabbet -- a fence and depth stop built into the tool itself, instead of relying on a separate guide.FlitchThe full stack of consecutive slices from one log, kept in their original cutting order -- what makes book matching and running a consistent grain pattern across a whole project possible.FlushPerfectly level with an adjoining surface -- no step, no proud edge, nothing to catch a fingernail on.Flush-Trim Router BitA straight bit with a bearing riding a template -- cuts a workpiece exactly to match a pattern, the standard way to make identical parts repeatably.Forstner BitsA drill bit that cuts a flat-bottomed hole and can cut right at the edge of a board or straddle an existing hole -- geometry a twist bit simply can't manage.Frame and PanelA floating center panel captured inside a solid-wood frame -- the construction that lets a wide wood surface move with the seasons instead of splitting.FretworkIntricate open, pierced patterns cut from thin stock -- decorative panels and lattice work made almost entirely of what's been cut away, not what's left.

H

Half-Lap JointRemove half the thickness from each of two boards and they overlap flush -- simple to cut, genuinely strong, and no thicker than either board alone.Hand PlanerThe powered cousin of a bench plane -- a spinning cutterhead in a handheld body, built for fast, rough stock removal rather than the fine shavings a hand tool takes.Hand ScrewsWooden-jawed clamps with two independent screws, letting the jaws tilt to grip irregular or tapered shapes a flat-jawed clamp can't hold evenly.HardboardA dense, uniform panel pressed from wood fibers with no visible grain at all -- pegboard's material, and the classic cheap drawer-bottom sheet good.HardwoodWood from a broadleaf, deciduous tree -- a botanical category, not a promise about actual hardness (balsa is technically a hardwood).HaunchA short return left on a tenon's shoulder specifically to fill and support a matching groove -- small, easy to miss, and structurally important where a mortise and tenon meets a panel groove.HighboyA tall chest of drawers on its own dedicated leg base -- the two-part case-furniture form colonial and 18th-century American furniture is best known for.Hold-Down (Holdfast)A tool that clamps a workpiece straight down onto the bench itself -- freeing both hands for hand-tool work a face vise can't reach.Holidays (Finishing Defect)A finishing term for spots accidentally skipped during application -- named, the story goes, for how obvious a missed patch becomes once the rest has dried.Hollow-GroundA concave-ground blade bevel -- thinner steel directly behind the edge for an easier push through the cut, traded for a slightly weaker edge than a flat grind.HoneycombingInternal drying cracks hidden inside a board, running along the rays -- the drying defect you only discover after you've already cut the piece open.Horsepower (Motor Rating)The traditional unit for a motor's power output -- worth understanding loosely, since marketing horsepower and actual measured horsepower on tool motors don't always agree.

M

Machinist SquaresA small, precision-ground square built to a tolerance a carpenter's square was never designed for -- the reference standard you check your other squares against.MalletA soft-faced striking tool built to drive a chisel or seat a joint without the steel-on-steel damage a hammer would leave behind.Marking GaugeA pin or blade dragged along a fence to scribe one precise, repeatable line parallel to a board's edge -- the layout tool a pencil can't match for accuracy.Marking KnifeA single-bevel blade that severs wood fibers instead of merely marking them -- the layout line a chisel or saw can register directly against.Marking RulersA fence on one end and a grid of pencil holes along the body -- hook it on an edge, drop a pencil in the numbered hole, and slide to draw a line exactly that far from the edge.MDF (Medium Density Fiberboard)Wood fibers pressed into an ultra-flat, grain-free panel -- paints like glass, machines cleanly, and dulls edges fast with its abrasive glue content.Medullary RaysThe radial cell structures running from a tree's core outward -- invisible on most cuts, but the source of the shimmering fleck pattern on quarter-sawn oak.MiterAn angled cut, almost always meeting a matching angled cut at a corner -- the joint behind picture frames, crown molding corners, and any box that shouldn't show end grain.Miter GaugeThe sliding guide that rides a table saw's miter slot -- for crosscuts and angled cuts across a board, doing the job a rip fence can't safely do.Miter JointTwo pieces cut at matching angles to hide all the end grain -- clean-looking, mechanically weak, and almost always worth reinforcing.Miter SawA pivoting circular blade purpose-built for crosscuts and angle cuts -- ask anyone who's tried to crosscut trim on a table saw why this tool exists.Moisture ContentThe percentage of a board's weight that's water -- the single number that predicts shrinkage, movement, and whether a board is actually ready to build with.Mortise and Tenon JointA tongue (tenon) fit into a matching cavity (mortise) -- unfashionably old, and still the joint most chairs are betting your weight on.Moulding (Molding)Shaped strip stock, cut to a decorative or functional profile -- the general category behind cove, ogee, roundover, and every other named edge shape.Mullion and MuntinThe dividers between panes of glass in a door or window -- mullions separate whole window units, muntins divide the panes within one.

P

Painter's PyramidsLittle plastic cones that hold a workpiece on a single point, so a wet finish can go right over the edge without the piece gluing itself to the bench.Parallel ClampsPremium bar clamps with a rectangular beam and self-squaring jaws that stay parallel to the work instead of tipping and digging in -- genuinely nicer for panel glue-ups, at a real price.ParticleboardWood chips and resin pressed into a flat panel -- the core material under most flat-pack furniture's laminate or veneer skin, cheap and heavy but genuinely weak at the fastener.Pilot HoleA hole drilled undersized for a screw's threads, so the screw bites cleanly instead of splitting the wood trying to force its own path.Pipe ClampsThe same sliding-jaw clamp mechanism as an F-clamp, mounted on ordinary plumbing pipe instead of a proprietary bar -- cheap length, in whatever size the glue-up actually needs.Plain-SawnThe default, least wasteful milling method -- flat, cathedral-grained boards cut tangent to the growth rings, more prone to cupping than quarter-sawn stock.PlanerA thickness planer mills a board to a consistent thickness pass after pass -- it flattens nothing, it just faithfully reproduces whatever reference face you feed it.PlaningShaving a board down to a consistent thickness or a smooth surface -- by hand with a plane, or by machine with a thickness planer.Plug CuttersCuts a short cylinder of your own stock to cap a counterbored screw hole -- so the patch is the same wood, the same grain and the same colour as everything around it.PlumbPerfectly vertical -- level's counterpart on the other axis, and just as easy to get wrong without checking.PlywoodThin wood veneers glued together with the grain alternating each layer -- the cross-grain structure is the whole point, not a manufacturing accident.Pocket Hole JigsAn angled guide that drills a hidden, self-tapping screw joint in seconds -- not the joinery a purist reaches for, but genuinely useful when speed and simplicity are the actual priority.Pocket Hole JoineryAn angled, self-tapping screw joint that trades joinery elegance for speed -- the right call more often than the purists let on.PolyurethaneThe most common modern film finish -- a synthetic varnish, durable and easy to find, applied in more coats than oil finishes but needing far less maintenance afterward.PredrillingDrilling a pilot hole before driving a screw -- the extra thirty seconds that prevents a split board, a stripped screw, and a fastener that wandered off-line.Press FitA joint held together by friction alone, sized so tight it needs force (not a hammer, ideally not glue) to seat -- precision measured in thousandths, not eighths.Push StickA shaped piece of wood or plastic that stands between your hand and a spinning blade -- the cheapest safety equipment in the shop, and the most skipped.

R

Rabbet JointAn L-shaped step cut into a board's edge or end -- the joint behind most drawer boxes and cabinet backs, simple to cut and stronger than a plain butt joint.Rail and StileThe two directions a frame's members run -- vertical stiles, horizontal rails -- the basic vocabulary behind every frame-and-panel door and face frame.Rake AngleThe forward or backward lean of a saw blade's teeth relative to the direction of cut -- more rake bites more aggressively, less rake cuts cleaner and slower.Random Orbital SanderThe sander that gets reached for the most in a furniture shop -- an eccentric, randomized orbit that sands aggressively without leaving the swirl marks a fixed-orbit sander does.Rasp and FileCoarse-toothed shaping tools for wood, distinguished by tooth pattern -- a rasp's individually punched teeth remove material fast and rough, a file's continuous rows leave a finer, smoother result.ResawSlicing a thick board into thinner slabs, the long way -- how one board becomes bookmatched panels or veneer instead of firewood.RevealA deliberate, consistent gap left between two elements -- a design choice, not a fit that came up short.Rift-SawnA milling method between plain- and quarter-sawn -- straighter grain than plain-sawn, without quarter-sawn's showy ray fleck, and usually the most wasteful (priciest) cut of the three.Rip CutCutting along the grain, changing a board's width -- the other half of every cut list, alongside the crosscut.Rotary-Cut (Rotary-Peeled) VeneerVeneer peeled off a spinning log like unrolling a paper towel -- the cheapest, most efficient slicing method, and the reason plywood face grain often looks wilder than a sliced veneer.RoundoverA convex curve easing a sharp corner into a smooth quarter-round -- the most common decorative and practical edge treatment there is, cut in one router pass.RouterOne tool, absurd range: swap the bit and it'll round an edge, cut a dado, hollow a mortise, or trim laminate flush, all at a speed that demands you pay attention.Router PlaneA flat-soled plane that trims a recess to one exact, consistent depth -- the hand-tool answer to a router for hinge mortises, inlay recesses, and tenon shoulders.Router TableA handheld router mounted upside-down under a table -- turns a portable tool into a stationary one, with both hands free to guide the workpiece instead of the router.Router Template Guide BushingsA collar that screws into the router base so the bit can follow a template without touching it. The basis of nearly all template routing that isn't done with a bearing bit.RoutingSpinning a shaped bit through wood to cut a profile, a groove, or an edge -- one machine, an enormous range of outcomes depending on the bit.Rule (Ruler)A straight, graduated measuring tool -- rigid or folding, the most basic layout instrument in any shop, and still worth choosing carefully for how it actually reads.

S

S2S, S3S, S4S (Surfacing Standards)Shorthand for how many faces of a rough board have been milled flat and smooth -- S4S is ready to use, S2S leaves the edges rough and up to you.Safety Glasses (Safety Goggles)Impact-rated eye protection -- glasses for general shop work, sealed goggles when there's real risk of debris from the side, not just straight ahead.Sanding DiscsThe actual abrasive that does the work while your random orbital sander gets all the credit -- and the consumable most people underspend on relative to how much it affects results.Sandpaper SheetsFlat abrasive sheets for hand sanding and sanding blocks -- distinct from Sanding Discs' round, hook-and-loop form factor for power sanders.Sapwood vs. HeartwoodThe living, moisture-conducting outer wood versus the dead, often darker structural core -- usually different in color, and always different in decay resistance.Screws and FastenersThe general hardware category -- distinct from Threaded Inserts, which solve the specific problem of a screw threading directly into end grain or particleboard.Self-Centering BitA drill bit built to find a hinge or hardware hole's exact center automatically -- a spring-loaded conical tip does the centering a human eye can't reliably match.Setup BlocksPrecision-ground blocks in known thicknesses, used to set a blade or bit height by touch instead of by squinting at a ruler.Shear ForcesA sideways, sliding stress at a joint line -- distinct from a straight pull-apart, and the reason racking resistance is judged separately from tension strength.Sheet GoodThe umbrella term for manufactured flat panel material -- plywood, MDF, particleboard, hardboard -- as distinct from solid lumber.ShellacA finish made from secreted resin, dissolved in alcohol -- fast-drying, food-safe once cured, and the traditional sealer under nearly any other finish.ShimA thin wedge or strip inserted to fill a gap or fine-tune an alignment -- the low-tech fix for problems a re-cut can't solve any more precisely.Shiplap JointRabbeted board edges that overlap rather than butt -- siding and paneling's answer to covering a wide span without a floating panel's complexity.Sliding Bevel (Bevel Gauge)An adjustable blade locked at any angle against a handle -- for transferring a real-world angle from a project onto a workpiece, rather than trusting a number on a protractor.Slotting CutterA router bit built to cut only a groove -- the bit family behind biscuit-style joints, T-molding slots, and drawer-bottom grooves cut with a router instead of a table saw.SnipeA shallow gouge at the very start or end of a planer or jointer pass -- a known, mostly-preventable machine quirk, not a sign of a dull cutter.SoftwoodWood from a coniferous, usually evergreen tree -- a botanical category, not a claim about how hard the wood actually is.Spade BitA flat, paddle-shaped drill bit for fast, rough holes -- cheap, quick, and not the bit to reach for when the hole actually needs to look clean.SpaltingFungal decay caught partway through its work -- the dramatic black zone lines and streaked color in spalted wood are the visible trail of that fungus, deliberately stopped before it turns the board to mush.Speed SquaresA triangular square that marks 90 and 45 degree angles in one motion against a board's edge -- built for framing speed, and handy well beyond framing.Spindle SanderA stationary sander built for curves and edges a handheld sander can't get into cleanly -- the tool that turns cabriole legs and curved aprons from a chore into a non-issue.Spline JoineryA thin strip of wood let into matching slots across a seam -- the standard fix for a joint, like a miter, that looks clean and holds together badly on its own.SpokeshaveA short-soled plane with a handle on each side -- pulled or pushed to shape curves and tapers a full-length bench plane physically can't follow.Spring ClampsSpring-loaded clamps that squeeze shut like an oversized clothespin -- fast, one-handed, and genuinely low on clamping force.SquareTwo surfaces meeting at exactly 90 degrees -- the state every joint is chasing, and the reason there's a whole drawer of tools named after it.Squeeze-OutThe excess glue that oozes from a joint under clamping pressure -- a good sign the joint has enough glue, and a mess that needs cleaning up before it dries.Stain (Oil-Based, Gel, Water-Based)Color applied to wood before a clear topcoat -- distinct from the finish itself, and the step where grain and figure get emphasized or evened out.Stick ChairA chair built from turned or shaved round parts joined directly into a solid seat -- no frame, no joinery beyond round tenons in round holes.Story StickA strip of scrap marked with a project's actual measurements, transferred directly rather than read off a tape -- eliminates the small reading errors a ruler invites when the same measurement gets used many times.Straight BitThe plainest router bit there is -- a simple vertical cutting edge for grooves, dados, and mortises, the bit every router owner reaches for most.StretcherA horizontal brace connecting a piece of furniture's legs below the seat or top -- resists racking, and does it with far less material than beefing up the legs themselves would.StropA leather (or leather-like) surface loaded with fine abrasive compound -- the final polishing step after sharpening, not a substitute for it.

T

Table SawThe tool most shops get built around -- a spinning blade poking up through a table, and the single most important machine to respect rather than fear.Tack ClothA lightly resin-tacky cloth for the final wipe-down before finishing -- lifts dust a vacuum or dry rag leaves behind, without leaving a residue of its own.TambourA rolling door or top made of narrow slats glued to a flexible backing -- curves around a corner where a rigid panel simply can't.TaperA workpiece narrowing gradually along its length -- table legs, tenons, dovetail pins, all rely on the same gradually-changing angle, cut with a dedicated jig for consistency.TearoutThe torn, chipped mess a cutting edge leaves when it lifts wood fibers instead of slicing them -- always avoidable in hindsight.TemplateA master pattern a bearing-guided router bit follows -- cut one shape carefully once, then reproduce it as many times as needed.Threaded InsertsA metal insert that gives soft, grain-inconsistent wood a real machine-thread socket -- so a bolt can be removed and reinstalled dozens of times without chewing up the hole.Throat (Machine Throat Depth)The distance from a saw's blade to the frame behind it -- the real limit on how wide a piece of work can actually reach the cutting edge.ToenailingDriving a fastener at an angle through one piece into another -- the fast, low-skill way to join framing members where a screw straight through isn't an option.Tongue and Groove JointA protruding ridge on one board slides into a matching channel on the next -- the joint behind flooring, paneling, and a lot of self-aligning panel work.TPI (Teeth Per Inch)How many teeth a saw blade packs into one inch -- fewer teeth cut faster and rougher, more teeth cut slower and smoother.Track SawA circular saw that rides a straight aluminum rail instead of a fence you have to clamp and square yourself -- the tool that made cutting sheet goods on a workbench actually pleasant.Track Saw SquareRegisters a guide rail at a true 90 degrees to the edge of a sheet in one motion, so breaking down plywood stops involving a tape measure and hope.TruingBringing a surface, edge, or tool back to genuinely flat, straight, or square -- correcting an existing inaccuracy, as distinct from simply flattening new stock.TrunnionsThe cast pivoting mechanism a table saw's arbor and motor assembly hang from -- what actually tilts and raises the blade, and a real, repairable part when a saw's alignment drifts.TurningSpinning a wood blank against a stationary cutting edge on a lathe -- the technique behind every round tool handle, bowl, chair leg, and spindle.

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