2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Piston \Pis"ton\, noun [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.

From WordNet (r) 3.0 (2006) [wn]:



1: United States neoclassical composer (1894-1976) [syn: {Piston}, {Walter Piston}]

2: mechanical device that has a plunging or thrusting motion [syn: {piston}, {plunger}]

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Tuesday, March 31, 2015 3:17:35 AM Coordinated Universal Time (UTC)