English definition of Jack

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Definition of jack

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"Jack (n.) A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack..

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Cleading :: Cleading (n.) A jacket or outer covering of wood, etc., to prevent radiation of heat, as from the boiler, cylinder. etc., of a steam engine..

Jacket :: "Jacket (v. t.) To put a jacket on; to furnish, as a boiler, with a jacket..

Allfours :: Allfours () A game at cards, called High, Low, Jack, and the Game..

Jackstay :: "Jackstay (n.) A rail of wood or iron stretching along a yard of a vessel, to which the sails are fastened..

Varlet :: Varlet (n.) In a pack of playing cards, the court card now called the knave, or jack..

Jackknife :: "Jackknife (n.) A large, strong clasp knife for the pocket; a pocket knife..

Juppon :: "Juppon (n.) A sleeveless jacket worn over the armor in the 14th century. It fitted closely, and descended below the hips..

Paltock :: Paltock (n.) A kind of doublet; a jacket.

Camisole :: Camisole (n.) A kind of straitjacket.

Saurel :: Saurel (n.) Any carangoid fish of the genus Trachurus, especially T. trachurus, or T. saurus, of Europe and America, and T. picturatus of California. Called also skipjack, and horse mackerel..

Skipjack :: Skipjack (n.) A name given to several kinds of a fish, as the common bluefish, the alewife, the bonito, the butterfish, the cutlass fish, the jurel, the leather jacket, the runner, the saurel, the saury, the threadfish, etc..

Black-jack :: Black-jack (n.) Caramel or burnt sugar, used to color wines, spirits, ground coffee, etc..

Runner :: Runner (n.) A food fish (Elagatis pinnulatus) of Florida and the West Indies; -- called also skipjack, shoemaker, and yellowtail. The name alludes to its rapid successive leaps from the water..

Sola :: Sola (n.) A leguminous plant (Aeschynomene aspera) growing in moist places in Southern India and the East Indies. Its pithlike stem is used for making hats, swimming-jackets, etc..

Minute-jack :: Minute-jack (n.) A figure which strikes the hour on the bell of some fanciful clocks; -- called also jack of the clock house.

Jackman :: "Jackman (n.) One wearing a jack; a horse soldier; a retainer. See 3d Jack, n..

Smokejack :: Smokejack (n.) A contrivance for turning a spit by means of a fly or wheel moved by the current of ascending air in a chimney.

Jack :: "Jack (n.) A compact, portable machine for planing metal..

Truss :: Truss (n.) A padded jacket or dress worn under armor, to protect the body from the effects of friction; also, a part of a woman's dress; a stomacher..

Jacket :: "Jacket (n.) An outer covering for anything, esp. a covering of some nonconducting material such as wood or felt, used to prevent radiation of heat, as from a steam boiler, cylinder, pipe, etc..