O-ring

noun

ˈō-ˌriŋ 

: a ring (as of synthetic rubber) used as a gasket

Examples of O-ring in a Sentence

Recent Examples on the Web

In 1986, the Challenger exploded during launch because of a tiny rubber O-ring. — Laura Zornosa, Los Angeles Times, 28 Oct. 2026

Hearings revealed engineers had raised concerns about the dangers of cold weather on the O-rings, but management ignored the warnings. — Richard Tribou, The Orlando Sentinel, 6 Sep. 2026

Both the tinder storage and ferro tube sections of the Pen-metheus are sealed off with O-rings to prevent any moisture penetration. — New Atlas, 22 June 2026

Its Aloe Flip-Flops are an easy, supportive summer sandal with a polished touch thanks to the O-ring hardware. — Annie Blackman, InStyle, 28 May 2026

Word History

First Known Use

1946, in the meaning defined above