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Jack 1Definition: 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.
Jack 2Definition: A familiar nickname of, or substitute for, John.
Jack 3Definition: An impertinent or silly fellow; a simpleton; a boor; a clown; also, a servant; a rustic.
Jack 4Definition: A popular colloquial name for a sailor; called also Jack tar, and Jack afloat.
Jack 5Definition: A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine, rendering convenient service, and often supplying the place of a boy or attendant who was commonly called Jack
Jack 6Definition: A device to pull off boots.
Jack 7Definition: A
sawhorse or sawbuck.
Jack 8Definition: A machine or contrivance for turning a spit; a smoke jack, or kitchen jack.
Jack 9Definition: A wooden wedge for separating
rocks rent by blasting.
Jack 10Definition: A lever for depressing the
sinkers which push the
loops down on the
Jack 11Definition: A grating to separate and guide the
threads; a heck box.
Jack 12Definition: A machine for twisting the sliver as it leaves the carding machine.
Jack 13Definition: A compact, portable machine for planing metal.
Jack 14Definition: A machine for slicking or pebbling leather.
Jack 15Definition: A system of gearing driven by a horse power, for multiplying speed.
Jack 16Definition: A hood or other device placed over a chimney or vent pipe, to prevent a back draught.
Jack 17Definition: In the harpsichord, an intermediate piece communicating the action of the key to the quill; called also hopper.
Jack 18Definition: In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself.
Jack 19Definition: 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 20Definition: The small bowl used as a mark in the game of bowls.
Jack 21Definition: The male of certain
animals, as of the ass.
Jack 22Definition: A young pike; a pickerel.
Jack 23Definition: The jurel.
Jack 24Definition: A large,
California rock fish
(Sebastodes paucispinus); called also
boccaccio, and merou.
Jack 25Definition: The
Jack 26Definition: A drinking measure holding half a pint; also, one holding a quarter of a pint.
Jack 27Definition: 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.
Jack 28Definition: A bar of iron athwart
ships at a topgallant masthead, to support a royal mast, and give spread to the royal
shrouds; called also jack
Jack 29Definition: The knave of a suit of playing
Jack 30Definition: A coarse and cheap mediaeval coat of defense,
esp. one made of leather.
Jack 31Definition: A pitcher or can of waxed leather; called also black jack.
Jack 32Definition: To hunt game at night by
means of a jack. See 2d Jack, n., n.
Jack 33Definition: To move or lift, as a house, by
means of a jack or
jacks. See 2d Jack, n.,
jack 34Definition: male donkey
jack 35Definition: any of several
fast-swimming predacious fishes of tropical to
jack 36Definition: tool for exerting pressure or lifting
jack 37Definition: one of four face cards in a deck bearing a picture of a young prince
jack 38Definition: small flag indicating a
jack 39Definition: game equipment consisting of one of several small
objects picked up while bouncing a ball in the game of jacks
jack 40Definition: an electrical device consisting of a connector socket designed for the insertion of a plug
jack 41Definition: immense East Indian fruit resembling breadfruit of; its seeds are commonly roasted
jack 42Definition: someone who works with their hands; someone engaged in manual labor
Jack 43Definition: a man who
serves as a sailor
jack 44Definition: a small worthless amount; "you
don''t know jack"
jack 45Definition: hunt with a jacklight
jack 46Definition: lift with a special device; "jack up the car so you can change the tire"