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NEW: Pecarus, by Lexmilian de Mello,
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pistol whip
pistol-whip
Pistolade
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pistoleer
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piston chamber
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piston pin
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Pisum
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Pisum sativum
Pisum sativum arvense
Pisum sativum macrocarpon
Pit
pit against
pit boss
pit bull
pit bull terrier
Pit coal

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Piston head definitions

Webster's 1913 Dictionary

Piston Pis"ton, n. [F. piston; cf. It. pistone piston, also pestone a large pestle; all fr. L. pinsere, pistum, to pound, to stamp. See Pestle, Pistil.] (Mach.) A sliding piece which either is moved by, or moves against, fluid pressure. It usually consists of a short cylinder fitting within a cylindrical vessel along which it moves, back and forth. It is used in steam engines to receive motion from the steam, and in pumps to transmit motion to a fluid; also for other purposes. Piston head (Steam Eng.), that part of a piston which is made fast to the piston rod. Piston rod, a rod by which a piston is moved, or by which it communicates motion. Piston valve (Steam Eng.), a slide valve, consisting of a piston, or connected pistons, working in a cylindrical case which is provided with ports that are traversed by the valve.



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