oil ring

noun

Definition of oil ring

1 : a seal engravers' finger ring having a small receptacle containing a mixture of oil and diamond dust used in replenishing the engraving tool
3 : a piston ring designed to secure proper distribution of lubricating oil over the length of cylinder wall traversed by the piston

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Cite this Entry

“Oil ring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oil%20ring. Accessed 8 Aug. 2020.

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