: a ring (as of synthetic rubber) used as a gasket
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In terms of espresso machine repair and maintenance, the Barista Tool's reamer/punch/sewing awl can leverage off the group head gasket, while the combination pliers can help in removing and handling other gaskets and O-rings.—New Atlas, 16 Nov. 2025 Overwhelmed by the realization that NASA had not revealed the O-ring issue to astronauts, chief astronaut John Young sent a memo to the entire astronaut corps expressing his outrage.—Alice George, Smithsonian Magazine, 18 July 2025 And the O-ring detail on the straps gives it a little flair for style.—Olivia Young, Travel + Leisure, 30 June 2025 In 1986, while serving on the commission to investigate the Challenger disaster, Feynman conceived of a famous demonstration—involving a piece of rubber and a glass of ice water—to show that the O-ring seals in the space shuttle’s rockets became unreliable at low temperatures.—Alec Nevala-Lee
june 11, Literary Hub, 11 June 2025 See All Example Sentences for O-ring