TAP n.
A tool for forming an internal screw, as in a nut, consisting of a hardened steel male screw grooved longitudinally so as to have cutting edges. On tap. (a) Ready to be drawn; as, ale on tap. (b) Broached, or furnished with a tap; as, a barrel on tap. -- Plug tap (Mech.), a screw-cutting tap with a slightly tapering e…
TAPE n.
A tapeline; also, a metallic ribbon so marked as to serve as a tapeline; as, a steel tape. Red tape. See under Red. -- Tape grass (Bot.), a plant (Vallisneria spiralis) with long ribbonlike leaves, growing in fresh or brackish water; -- called also fresh-water eelgrass, and, in Maryland, wild celery. -- Tape needle.…
TEMPERING n.
ocess of giving the requisite degree of hardness or softness to a substance, as iron and steel; especially, the process of giving to steel the degree of hardness required for various purposes, consisting usually in first plunging the article, when heated to redness, in cold water or other liquid, to give an excess of h…