sliding piston

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• 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… …   The Collaborative International Dictionary of English

• Piston head — 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… …   The Collaborative International Dictionary of English

• Piston rod — 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… …   The Collaborative International Dictionary of English

• Piston valve — 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… …   The Collaborative International Dictionary of English

• piston — [pis′tən] n. [Fr < It pistone < pistare, to pound, crush < LL, freq. of L pinsere, to pound, beat: see PESTLE] 1. the snug fitting engine part that is forced back and forth within a cylinder by the pressure of combustion, steam, etc. and …   English World dictionary

• piston and cylinder — In mechanical engineering, a sliding cylinder with a closed head (the piston) that moves up and down (or back and forth) in a slightly larger cylindrical chamber (the cylinder) by or against pressure of a fluid, as in an engine or pump. The… …   Universalium

• piston — n. 1 a disc or short cylinder fitting closely within a tube in which it moves up and down against a liquid or gas, used in an internal combustion engine to impart motion, or in a pump to receive motion. 2 a sliding valve in a trumpet etc. Phrases …   Useful english dictionary

• Piston — n. 1 a disc or short cylinder fitting closely within a tube in which it moves up and down against a liquid or gas, used in an internal combustion engine to impart motion, or in a pump to receive motion. 2 a sliding valve in a trumpet etc. Phrases …   Useful english dictionary

• sliding-caliper disc brake — A disc brake design with a sliding caliper. In one type, the caliper floats on the caliper frame grooves. The major components are: caliper (a casting with one cylinder and piston), caliper frame (casting) which is bolted to the suspension. In… …   Dictionary of automotive terms

• sliding pair — Pair Pair (p[^a]r), n. [F. paire, LL. paria, L. paria, pl. of par pair, fr. par, adj., equal. Cf. {Apparel}, {Par} equality, {Peer} an equal.] [1913 Webster] 1. A number of things resembling one another, or belonging together; a set; as, a pair… …   The Collaborative International Dictionary of English

• piston — noun Etymology: French, from Italian pistone, from pistare to pound, from Old Italian, from Medieval Latin, from Latin pistus, past participle of pinsere to crush more at pestle Date: 1704 1. a sliding piece moved by or moving against fluid… …   New Collegiate Dictionary