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A piece of wood or metal, usually flat and elongated, turning on a nail or screw, to fasten something, as a door.

A person having authority over others acting in concert; as, the captain of a boat's crew; the captain of a football team. A trainband captain eke was he. Cowper. The Rhodian captain, relying on . . . the lightness of his vessel, passed, in open day, through all the guards. Arbuthnot.

, to produce a different but definite rate of angular velocity in an axis, as in cutting screws, gear, etc. -- To ring the changes on, to present the same facts or arguments in variety of ways.

To cut, so as to make a screw thread.

A tool with several points, used for cutting or finishing screw threads, either external or internal, on work revolving in a lathe.

ay be verified, or on which they may be checked. -- Check nut (Mech.), a secondary nut, screwing down upon the primary nut to secure it. Knight. -- Check valve (Mech.), a valve in the feed pipe of a boiler to prevent the return of the feed water. -- To take check, to take offense. [Obs.] Dryden.

An instrument with a screw or screws by which work is held in its place or two parts are temporarily held together.

o assists in preparing a student for examination; a trainer; esp. one who trains a boat's crew for a race. [Colloq.] Wareham was studying for India with a Wancester coach. G. Eliot.

The steersman of a boat; a petty officer who has charge of a boat and its crew.

A tool with teeth, used for chasing screws on work in a lathe; a chaser.

he orders, etc. -- To put a vessel out of commission (Naut.), to detach the officers and crew and retire it from active service, temporarily or permanently. -- To put the great seal, or the Treasury, into commission, to place it in the hands of a commissioner or commissioners during the abeyance of the ordinary admin…

The crew of a ship, including the officers; as, a whole ship's company.

c and b:d. -- Compound rest (Mech.), the tool carriage of an engine lathe. -- Compound screw (Mech.), a screw having on the same axis two or more screws with different pitch (a differential screw), or running in different directions (a right and left screw). -- Compound time (Mus.), that in which two or more simple…

bjects from place to place; esp., one for conveying grain, coal, etc., -- as a spiral or screw turning in a pipe or trough, an endless belt with buckets, or a truck running along a rope.

argement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.

ssion around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw.

A rectangular frame, with a tightening screw, used for compressing the jionts of framework, etc.

A small jackscrew. Knight.

A contemptible or vicious critic. The rancorous and reptile crew of poeticules, who decompose into criticasters. Swinburne.

ross wires, fine wires made to traverse the field of view in a telescope, and moved by a screw with a graduated head, used for delicate astronomical observations; spider lines. Fixed cross wires are also used in microscopes, etc.