piston ring

noun

Definition of piston ring

:a springy split metal ring for sealing the gap between a piston and the cylinder wall

Recent Examples of piston ring from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'piston ring.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of piston ring

1754


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