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..

Lern More About Jack

Jack :: Jack (n.) The jurel.
Blende :: Blende (n.) A mineral, called also sphalerite, and by miners mock lead, false galena, and black-jack. It is a zinc sulphide, but often contains some iron. Its color is usually yellow, brown, or black, and its luster resinous..
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..
Split :: Split (v. i.) to divide one hand of blackjack into two hands, allowed when the first two cards dealt to a player have the same value..
Allfours :: Allfours () A game at cards, called High, Low, Jack, and the Game..
Roundabout :: Roundabout (n.) A short, close jacket worn by boys, sailors, etc..
Jack :: "Jack (n.) A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat..
Jack :: Jack (n.) A machine for twisting the sliver as it leaves the carding machine.
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..
Jacksmith :: "Jacksmith (n.) A smith who makes jacks. See 2d Jack, 4, c..
Jackstay :: "Jackstay (n.) A rail of wood or iron stretching along a yard of a vessel, to which the sails are fastened..
Sweater :: Sweater (n.) A woolen jacket or jersey worn by athletes.
Jack :: "Jack (n.) In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself..
Plane :: Plane (a.) A tool for smoothing boards or other surfaces of wood, for forming moldings, etc. It consists of a smooth-soled stock, usually of wood, from the under side or face of which projects slightly the steel cutting edge of a chisel, called the iron, which inclines backward, with an apperture in front for the escape of shavings; as, the jack plane; the smoothing plane; the molding plane, etc..
Jackstone :: Jackstone (n.) One of the pebbles or pieces used in the game of jackstones.
Jacksnipe :: "Jacksnipe (n.) A small American sandpiper (Tringa maculata); -- called also pectoral sandpiper, and grass snipe..
Air Jacket :: Air jacket () A jacket having air-tight cells, or cavities which can be filled with air, to render persons buoyant in swimming..
Jump :: Jump (n.) A kind of loose jacket for men.
Split :: Split (n.) the division by a player of one hand of blackjack into two hands, allowed when the first two cards dealt to a player have the same value; the player is usually obliged to increase the amount wagered by placing a sum equal to the original bet on the new hand thus created..
Jackpudding :: Jackpudding (n.) A merry-andrew; a buffoon.
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