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Vacuum :: Vacuum (n.) A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum..

Air Gun :: Air gun () A kind of gun in which the elastic force of condensed air is used to discharge the ball. The air is powerfully compressed into a reservoir attached to the gun, by a condensing pump, and is controlled by a valve actuated by the trigger..

Mould :: Mould (n.) A frame with a wire cloth bottom, on which the pump is drained to form a sheet, in making paper by hand..

Camel :: Camel (n.) A water-tight structure (as a large box or boxes) used to assist a vessel in passing over a shoal or bar or in navigating shallow water. By admitting water, the camel or camels may be sunk and attached beneath or at the sides of a vessel, and when the water is pumped out the vessel is lifted..

Pump :: Pump (v. t.) Figuratively, to draw out or obtain, as secrets or money, by persistent questioning or plying; to question or ply persistently in order to elicit something, as information, money, etc..

Elatrometer :: Elatrometer (n.) An instrument for measuring the degree of rarefaction of air contained in the receiver of an air pump.

Petroleum :: Petroleum (n.) Rock oil, mineral oil, or natural oil, a dark brown or greenish inflammable liquid, which, at certain points, exists in the upper strata of the earth, from whence it is pumped, or forced by pressure of the gas attending it. It consists of a complex mixture of various hydrocarbons, largely of the methane series, but may vary much in appearance, composition, and properties. It is refined by distillation, and the products include kerosene, benzine, gasoline, paraffin, etc..

Box :: Box (n.) A chamber or section of tube in which a valve works; the bucket of a lifting pump.

Brake :: Brake (v. t.) An extended handle by means of which a number of men can unite in working a pump, as in a fire engine..

Air Chamber :: Air chamber () A cavity containing air to act as a spring for equalizing the flow of a liquid in a pump or other hydraulic machine.

Pie :: Pie (n.) An article of food consisting of paste baked with something in it or under it; as, chicken pie; venison pie; mince pie; apple pie; pumpkin pie..

Injection :: Injection (n.) The act of injecting or throwing in; -- applied particularly to the forcible throwing in of a liquid, or aeriform body, by means of a syringe, pump, etc..

Pumpion :: Pumpion (n.) See Pumpkin.

Forcer :: Forcer (n.) The solid piston of a force pump; the instrument by which water is forced in a pump.

Bucket :: Bucket (n.) The valved piston of a lifting pump.

Pumping :: Pumping () a. & n. from pump.

Pompion :: Pompion (n.) See Pumpion.

Chain Wheel :: Chain wheel () An inversion of the chain pump, by which it becomes a motor driven by water..

Pump :: Pump (n.) An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston..

Pumpkin :: Pumpkin (n.) A well-known trailing plant (Cucurbita pepo) and its fruit, -- used for cooking and for feeding stock; a pompion..

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