Screw

skroo, n. A cylinder, or a cylindrical per for a- tion, having a continuous rib or thread winding round spirally, — one of the 6 mechanical powers: see Mechanical Powers a small metal cylinder with sharp point, spiral thread, and slotted head, used in place of a nail anything shaped or acting like a screw esp., a form of wheel for propelling steam ve els a miser skinflint sharp bargainer a harsh, inexorable instructor a persistent questioner a small quantity of tobacco, etc., twisted up in a piece of paper; a steam-ve el propelled by a screw instead of wheels.— v. [screwed (skrood), screwing.] To pre , fasten, or make firm by a screw to force, squeeze, pre to use violent means toward; to deform by contortions; to distort. [ME. scrue, OF. escroue, a screw, prop, the cavity within which the male screw works, fr. L. scrobs, scrobis, a ditch, groove, in LL. the trench made by swine boring in the ground.] — Screw'-driv'er, n. An implement for turning screws, resembling a blunt chisel. — -jack, n. A contrivance for raising great weights through short lifts by means of a stout screw working in a nut or female screw in the body of the instrument. —pine, n. A tree or bush having long, lanceolate leaves, like those of the pineapple, arranged spirally about the trunk, whence the name: grows in loose, sandy, or marshy places, on tropical islands of the Old World and the Pacific Ocean.—propel'ler, n. A steam-ve el propelled by a screw also the screw, or spiral-bladed wheel, used in the propulsion of steam ve els: see Ship.