o ring

1. 1.

   a gasket consisting of a flat ring of rubber or plastic; used to seal a joint against high pressure

   Broadergasket

Questions about o ring

What does o ring mean?

o ring means "a gasket consisting of a flat ring of rubber or plastic; used to seal a joint against high pressure".

Is o ring a common word?

o ring is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.