Bullnose

A bullnose profile rounds an edge into a full half-circle, effectively a roundover cut symmetrically on both faces of an edge rather than easing just one corner -- the shape most familiar from a stair tread's rounded front lip, or a countertop edge finished with a fully rounded rather than a flat chamfered or eased edge. A bullnose bit with a bearing large enough to reference the full radius can cut the profile in one or two passes, one from each face, meeting in the middle.

A bevel-edge chisel, a related but different use of the term, refers instead to a chisel ground with beveled (angled) side edges rather than square ones, letting it reach into the tight corners of a dovetail pin socket that a square-edged chisel's shoulders would collide with.