Free Dictionary

Free Dictionary

Home ×
Link Link Link Link

Search Result for "piston": 
Wordnet 3.0

NOUN (2)

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

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

The Collaborative International Dictionary of English v.0.48:

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. [1913 Webster] 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. [1913 Webster]