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IELTS BNC: 15187 COCA: 13303

piston

1 ENTRIES FOUND:
piston /ˈpɪstən/ noun
plural pistons
piston
/ˈpɪstən/
noun
plural pistons
Learner's definition of PISTON
[count]
: a part of an engine that moves up and down inside a tube and that causes other parts of the engine to move活塞 see picture at engine

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