English Explanatory Dictionary

piston

English dictionary entry

Meanings

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. A valve device in some brass instruments for changing the pitch
verb
  1. To move up and down or in and out like a piston.
name
  1. A surname.

Pronunciation

pĭs'tən /ˈpɪstən/ En-us-piston.ogg

Word forms

piston pistons pistoning pistoned

Etymology

From French piston.

Derived words

multipiston opposed piston opposed cylinder piston engine pistoning pistonless pistonlike pistonphone piston ring piston rod piston valve trunk piston
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