O-ringn.
/ˈəʊrɪŋ/, U.S. /ˈoʊˌrɪŋ/ A gasket or seal (usually of rubber) in the form of a ring with a circular cross-section.
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society > occupation and work > equipment > other specific types of equipment > [noun] > washer or liner
washer1346
gasket1828
babbitting1851
bush1865
hat leather1869
liner1886
space washer1934
O-ring1954
1954 World Oil Mar. 124/2 A separate 37-point receptacle was..fitted flush with the surface in the side of the instrument sub with an ‘O’-ring seal protected cover.
1959 H. Barnes Oceanogr. & Marine Biol. iv. 182 The sphere [sc. the Deep Sea Benthograph] has five openings, the largest of which is a 15-in. diameter access door closed by a cast steel plate bolted in place and sealed by two neoprene O-rings.
1971 C. M. Blow Rubber Technol. & Manuf. x. 443 The O-ring is very widely used, though some designers prefer the rectangular, D, or delta sections.
1994 C. Pursell White Heat ii. 54 In 1933 he came up with his second, and most important, invention—one that would prevent the leaking of fluids around a piston: the O-ring, made tragically famous in 1986 when one failed on the spacecraft Challenger.
This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).
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n.1954