piston ring


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

When his father and three uncles opted to specialize in piston ring production under the Perfect Circle brand, Ralph became the company’s lead engineer—and eventually its president. David Sears, Smithsonian, "The Sightless Visionary Who Invented Cruise Control," 9 Mar. 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," 29 Nov. 2017 Grover, which makes piston rings and seals, is proposing to use an 80,000-square-foot industrial building at 5730 N. Glen Park Road, according to information filed with Glendale officials. Tom Daykin, Milwaukee Journal Sentinel, "Milwaukee manufacturer proposes move to Glendale, along with its smaller Texas operation," 31 Aug. 2017

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.

See More

First Known Use of piston ring

1754, in the meaning defined above

Keep scrolling for more

Learn More about piston ring

Share piston ring

Statistics for piston ring

Look-up Popularity

Time Traveler for piston ring

The first known use of piston ring was in 1754

See more words from the same year

More from Merriam-Webster on piston ring

Britannica.com: Encyclopedia article about piston ring

Comments on piston ring

What made you want to look up piston ring? Please tell us where you read or heard it (including the quote, if possible).


playful or foolish behavior

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!