piston

piston — noun

1. a solid metal part fitted inside a tube or cylinder, repeatedly sliding to press

1.名詞C1
釋義

a solid metal part fitted inside a tube or cylinder, repeatedly sliding to press gas or liquid and drive the rest of a machine, especially an engine

例句

The mechanic replaced one cracked piston before the race on Sunday.

replace a piston

Inside the engine, each piston rose and fell in perfect time.

piston moving in an engine

同義詞
  • plunger

    broader term for a part that moves straight in and out, especially in pumps or hand tools

  • ram

    heavier industrial word, often used for hydraulic machinery that pushes with force

文法句型

engine piston

replace a piston

piston inside a cylinder

the piston slides back and forth

用法筆記

Usually named as part of an engine, pump, or brake system, often with words such as cylinder, ring, rod, replace, or seize. Distinguish from the cylinder: the piston is the part that moves inside it.

常見錯誤

❌The cylinder was moving up and down.
✅The piston was moving up and down inside the cylinder.
💡the piston is the moving part; the cylinder is the space around it.