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

Pancake :: Pancake (n.) A thin cake of batter fried in a pan or on a griddle; a griddlecake; a flapjack.
Jack :: "Jack (n.) A machine or contrivance for turning a spit; a smoke jack, or kitchen jack..
Jack :: "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..
Jack :: "Jack (n.) A large, California rock fish (Sebastodes paucispinus); -- called also boccaccio, and merou..
Jack :: "Jack (n.) A flag, containing only the union, without the fly, usually hoisted on a jack staff at the bowsprit cap; -- called also union jack. The American jack is a small blue flag, with a star for each State..
Sphalerite :: Sphalerite (n.) Zinc sulphide; -- called also blende, black-jack, false galena, etc. See Blende (a)..
Jack :: "Jack (n.) An impertinent or silly fellow; a simpleton; a boor; a clown; also, a servant; a rustic..
Jackstone :: Jackstone (n.) A game played with five small stones or pieces of metal. See 6th Chuck.
Jacket :: "Jacket (n.) A garment resembling a waistcoat lined with cork, to serve as a life preserver; -- called also cork jacket..
Jack :: "Jack (n.) A large tree, the Artocarpus integrifolia, common in the East Indies, closely allied to the breadfruit, from which it differs in having its leaves entire. The fruit is of great size, weighing from thirty to forty pounds, and through its soft fibrous matter are scattered the seeds, which are roasted and eaten. The wood is of a yellow color, fine grain, and rather heavy, and is much used in cabinetwork. It is also used for dyeing a brilliant yellow..
Jersey :: "Jersey (n.) A kind of knitted jacket; hence, in general, a closefitting jacket or upper garment made of an elastic fabric (as stockinet)..
Juppon :: "Juppon (n.) A sleeveless jacket worn over the armor in the 14th century. It fitted closely, and descended below the hips..
Jackanapes :: Jackanapes (n.) A coxcomb; an impertinent or conceited fellow.
Langdak :: Langdak (n.) A wolf (Canis pallipes), found in India, allied to the jackal..
Jacketing :: "Jacketing (n.) The material of a jacket; as, nonconducting jacketing..
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..
Jacksmith :: "Jacksmith (n.) A smith who makes jacks. See 2d Jack, 4, c..
Paltock :: Paltock (n.) A kind of doublet; a jacket.
Camisole :: Camisole (n.) A kind of straitjacket.
Jack :: Jack (n.) A wooden wedge for separating rocks rent by blasting.
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