Longman Dictionary of Contemporary English homepage

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

piston

noun
     
Related topics: Engineering
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

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary