Longman Dictionary of Contemporary English homepage

Topic: ENGINEERING

Date: 1700-1800
Language: French
Origin: Italian pistone 'large stick for crushing', from pistare 'to crush'

piston

 noun
     
pis‧ton [countable]
TE a part of an engine consisting of a short solid piece of metal inside a tube, which moves up and down to make the other parts of the engine move
Definition of piston from the Longman Dictionary of Contemporary English within
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