a ring of pliable material, as rubber or neoprene, used as a gasket: the failure of an O-ring caused the explosion that destroyed the space shuttle Challenger in 1986.
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How to use O-ring in a sentence
Or someone yelling to someone else for another O-ring or a box-end wrench.
Join ease and an ornament, by a vowel, and make recovering—thus: rest-O-ring (restoring).St. Nicholas, Vol. 5, No. 5, March, 1878 | Various
British Dictionary definitions for O-ring
a rubber ring used in machinery as a seal against oil, air, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012