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screw
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- Screw - n. - A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or, more usually the screw; the latter as the internal, or female screw, or, more usually, the nut.
- Screw - n. - Specifically, a kind of nail with a spiral thread and a head with a nick to receive the end of the screw-driver. Screws are much used to hold together pieces of wood or to fasten something; -- called also wood screws, and screw nails. See also Screw bolt, below.
- Screw - n. - Anything shaped or acting like a screw; esp., a form of wheel for propelling steam vessels. It is placed at the stern, and furnished with blades having helicoidal surfaces to act against the water in the manner of a screw. See Screw propeller, below.
- Screw - n. - A steam vesel propelled by a screw instead of wheels; a screw steamer; a propeller.
- Screw - n. - An extortioner; a sharp bargainer; a skinflint; a niggard.
- Screw - n. - An instructor who examines with great or unnecessary severity; also, a searching or strict examination of a student by an instructor.
- Screw - n. - A small packet of tobacco.
- Screw - n. - An unsound or worn-out horse, useful as a hack, and commonly of good appearance.
- Screw - n. - A straight line in space with which a definite linear magnitude termed the pitch is associated (cf. 5th Pitch, 10 (b)). It is used to express the displacement of a rigid body, which may always be made to consist of a rotation about an axis combined with a translation parallel to that axis.
- Screw - n. - An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand.
- Screw - v. t. - To turn, as a screw; to apply a screw to; to press, fasten, or make firm, by means of a screw or screws; as, to screw a lock on a door; to screw a press.
- Screw - v. t. - To force; to squeeze; to press, as by screws.
- Screw - v. t. - Hence: To practice extortion upon; to oppress by unreasonable or extortionate exactions.
- Screw - v. t. - To twist; to distort; as, to screw his visage.
- Screw - v. t. - To examine rigidly, as a student; to subject to a severe examination.
- Screw - v. i. - To use violent mans in making exactions; to be oppressive or exacting.
- Screw - v. i. - To turn one's self uneasily with a twisting motion; as, he screws about in his chair.
- Screw-cutting - a. - Adapted for forming a screw by cutting; as, a screw-cutting lathe.
- Screw-driver - n. - A tool for turning screws so as to drive them into their place. It has a thin end which enters the nick in the head of the screw.
- Screwed - imp. & p. p. - of Screw
- Screwer - n. - One who, or that which, screws.
- Screwing - p. pr. & vb. n. - of Screw
- Screwing - - a. & n. from Screw, v. t.
- Chase - v. t. - To cut, so as to make a screw thread.
- Pandanus - n. - A genus of endogenous plants. See Screw pine.
- Tonophant - n. - A modification of the kaleidophon, for showing composition of acoustic vibrations. It consists of two thin slips of steel welded together, their length being adjystable by a screw socket.
- Thread - n. - The prominent part of the spiral of a screw or nut; the rib. See Screw, n., 1.
- Clamp - n. - An instrument with a screw or screws by which work is held in its place or two parts are temporarily held together.
- Machine - n. - In general, any combination of bodies so connected that their relative motions are constrained, and by means of which force and motion may be transmitted and modified, as a screw and its nut, or a lever arranged to turn about a fulcrum or a pulley about its pivot, etc.; especially, a construction, more or less complex, consisting of a combination of moving parts, or simple mechanical elements, as wheels, levers, cams, etc., with their supports and connecting framework, calculated to constitute a prime mover, or to receive force and motion from a prime mover or from another machine, and transmit, modify, and apply them to the production of some desired mechanical effect or work, as weaving by a loom, or the excitation of electricity by an electrical machine.
- Garrote - n. - A Spanish mode of execution by strangulation, with an iron collar affixed to a post and tightened by a screw until life become extinct; also, the instrument by means of which the punishment is inflicted.
- Corkscrew - n. - An instrument with a screw or a steel spiral for drawing corks from bottles.
- Screw - n. - An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand.
- Well - v. i. - A vertical passage in the stern into which an auxiliary screw propeller may be drawn up out of water.
- Hob - n. - A threaded and fluted hardened steel cutter, resembling a tap, used in a lathe for forming the teeth of screw chasers, worm wheels, etc.
- Propeller - n. - A steamboat thus propelled; a screw steamer.
- Tourniquet - n. - An instrument for arresting hemorrhage. It consists essentially of a pad or compress upon which pressure is made by a band which is tightened by a screw or other means.
- Jackscrew - n. - A jack in which a screw is used for lifting, or exerting pressure. See Illust. of 2d Jack, n., 5.
- Tap - v. t. - To form an internal screw in (anything) by means of a tool called a tap; as, to tap a nut.
- Thread - v. t. - To form a thread, or spiral rib, on or in; as, to thread a screw or nut.
- Doublethreaded - a. - Having two screw threads instead of one; -- said of a screw in which the pitch is equal to twice the distance between the centers of adjacent threads.
- Wrench - v. t. - An instrument, often a simple bar or lever with jaws or an angular orifice either at the end or between the ends, for exerting a twisting strain, as in turning bolts, nuts, screw taps, etc.; a screw key. Many wrenches have adjustable jaws for grasping nuts, etc., of different sizes.
- Chaser - n. - A tool with several points, used for cutting or finishing screw threads, either external or internal, on work revolving in a lathe.
- Wash - n. - The backward current or disturbed water caused by the action of oars, or of a steamer's screw or paddles, etc.
- Drag - v. t. - The difference between the speed of a screw steamer under sail and that of the screw when the ship outruns the screw; or between the propulsive effects of the different floats of a paddle wheel. See Citation under Drag, v. i., 3.
- Turn-buckle - n. - A loop or sleeve with a screw thread at one end and a swivel at the other, -- used for tightening a rod, stay, etc.
- Screw - v. t. - To turn, as a screw; to apply a screw to; to press, fasten, or make firm, by means of a screw or screws; as, to screw a lock on a door; to screw a press.
- Die - n. - A hollow internally threaded screw-cutting tool, made in one piece or composed of several parts, for forming screw threads on bolts, etc.; one of the separate parts which make up such a tool.
- Screw-cutting - a. - Adapted for forming a screw by cutting; as, a screw-cutting lathe.