piston

Etymology

From French piston.

noun

  1. A solid disk or cylinder that fits inside a hollow cylinder, and moves under pressure (as in an engine) or displaces fluid (as in a pump)
  2. (music) A valve device in some brass instruments for changing the pitch

verb

  1. (intransitive) To move up and down or in and out like a piston.

Attribution / Disclaimer All definitions come directly from Wiktionary using the Wiktextract library. We do not edit or curate the definitions for any words, if you feel the definition listed is incorrect or offensive please suggest modifications directly to the source (wiktionary/piston), any changes made to the source will update on this page periodically.