piston ring

noun

Definition of piston ring

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

Examples of piston ring in a Sentence

Recent Examples on the Web The piston rings are supposed to fit tightly against the cylinder walls and scrape off all the oil before combustion takes place, so gasoline and air get combusted and your oil doesn't. Ray Magliozzi, courant.com, "Car Talk: They don’t build cars like this anymore," 10 Nov. 2019 Enhancements to the engine relative to the 50i's unit include a block made of a new aluminum alloy, a viscous damper on the crankshaft, stronger pistons and piston rings, and an iron coating on the cylinder walls. Daniel Golson, Car and Driver, "The 2020 BMW X5 and X7 Get New M50i Performance Variants," 22 May 2019 The life of components like piston rings and cylinder liners can be significantly reduced by gasoline washing away the lubricating oil, not to mention the extra fuel that is used while the engine runs rich. Jay Bennett, Popular Mechanics, "Warming Up Your Car in the Cold Just Harms the Engine," 28 Dec. 2018 Enhancements to the engine relative to the 50i's unit include a block made of a new aluminum alloy, a viscous damper on the crankshaft, stronger pistons and piston rings, and an iron coating on the cylinder walls. Daniel Golson, Car and Driver, "The 2020 BMW X5 and X7 Get New M50i Performance Variants," 22 May 2019 The life of components like piston rings and cylinder liners can be significantly reduced by gasoline washing away the lubricating oil, not to mention the extra fuel that is used while the engine runs rich. Jay Bennett, Popular Mechanics, "Warming Up Your Car in the Cold Just Harms the Engine," 28 Dec. 2018 The life of components like piston rings and cylinder liners can be significantly reduced by gasoline washing away the lubricating oil, not to mention the extra fuel that is used while the engine runs rich. Jay Bennett, Popular Mechanics, "Warming Up Your Car in the Cold Just Harms the Engine," 28 Dec. 2018 The life of components like piston rings and cylinder liners can be significantly reduced by gasoline washing away the lubricating oil, not to mention the extra fuel that is used while the engine runs rich. Jay Bennett, Popular Mechanics, "Warming Up Your Car in the Cold Just Harms the Engine," 28 Dec. 2018 The life of components like piston rings and cylinder liners can be significantly reduced by gasoline washing away the lubricating oil, not to mention the extra fuel that is used while the engine runs rich. Jay Bennett, Popular Mechanics, "Warming Up Your Car in the Cold Just Harms the Engine," 28 Dec. 2018

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.

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First Known Use of piston ring

1754, in the meaning defined above

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The first known use of piston ring was in 1754

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Cite this Entry

“Piston ring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/piston%20ring. Accessed 4 Jul. 2020.

More from Merriam-Webster on piston ring

Britannica.com: Encyclopedia article about piston ring

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