pis‧ton /ˈpɪst
ən/
noun [countable][
Date: 1700-1800;
Language: French;
Origin: Italian pistone 'large stick for crushing', from pistare 'to crush']
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
[TahlilGaran] Dictionary of Contemporary English ▲