brec·​cia | \ ˈbre-ch(ē-)ə How to pronounce breccia (audio) \

Definition of breccia

: a rock composed of sharp fragments embedded in a fine-grained matrix (such as sand or clay)

Examples of breccia in a Sentence

Recent Examples on the Web The Pinnacles’ high peaks are mostly volcanic breccia, which is more vulnerable to crumbling, a different sort of challenge. Christopher Reynolds, Los Angeles Times, 10 Feb. 2022 The next two hours of our afternoon were spent pacing back and forth along the base of Machete Ridge, a colossal fin of volcanic breccia, growing increasingly frustrated as the sun began to sink. Emily Pennington, Outside Online, 25 Feb. 2020 The most habitable meteorite samples analyzed appeared to be made of a rock type called regolith breccia. Nikk Ogasa, Scientific American, 19 July 2021 Impact melt breccia is a type of lunar rock formed from asteroids striking the surface of the moon. Fox News, 9 July 2020 In their paper, the scientists explain that the substance discovered by the Chang’e 4 mission’s Yutu-2 rover is similar to two melt breccia samples returned from the moon by NASA’s Apollo 15 and Apollo 17 missions. Fox News, 9 July 2020 The rock 14321 is a breccia, or a conglomeration of rocks and minerals all cemented together in a mosaic-like pattern. Jay Bennett, Smithsonian, 28 Jan. 2019 The astronauts found two main types of rocks at their landing: basalts and breccias, according to the Universities Space Research Association. Ryan W. Miller, USA TODAY, 19 July 2019 Small rock fragments are sometimes fused under the intense heat and pressure of the impacts, forming breccias. Ryan W. Miller, USA TODAY, 19 July 2019 See More

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

First Known Use of breccia

1758, in the meaning defined above

History and Etymology for breccia


Learn More About breccia

Time Traveler for breccia

Time Traveler

The first known use of breccia was in 1758

See more words from the same year

Dictionary Entries Near breccia




See More Nearby Entries 

Statistics for breccia

Cite this Entry

“Breccia.” Dictionary, Merriam-Webster, Accessed 3 Jul. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on breccia Encyclopedia article about breccia


Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

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