o-ring

o-ring — noun

1. a small round rubber seal that fits between joined parts to stop liquid or air f

1.名詞B2
釋義

a small round rubber seal that fits between joined parts to stop liquid or air from leaking out

例句

The mechanic replaced the cracked O-ring inside the fuel pump before lunch.

collocation: replace a cracked O-ring

Greta rubbed silicone grease on the O-ring before fitting the lid.

pattern: grease + O-ring before fitting

同義詞
  • gasket

    a broader sealing part, often used between larger flat surfaces

  • seal

    a general word for any part that keeps liquid or air from escaping

  • washer

    a related ring-shaped part, but often used to spread pressure rather than make a tight seal

用法筆記

Usually refers to a circular seal with a round cross-section. Common contexts include pumps, valves, hose joints, diving gear, and other parts that must stay airtight or watertight.

常見錯誤

❌The O-ring is just a flat washer.
✅The O-ring is a sealing ring, not just a flat washer.
💡An O-ring is mainly used to stop leaks, while a washer is often flatter and serves a different mechanical purpose.