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breccia

American  
[brech-ee-uh, bresh-] / ˈbrɛtʃ i ə, ˈbrɛʃ- /

noun

Petrology.
  1. rock composed of angular fragments of older rocks melded together.


breccia British  
/ ˈbrɛtʃɪə /

noun

  1. a rock consisting of angular fragments embedded in a finer matrix, formed by erosion, impact, volcanic activity, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

breccia Scientific  
/ brĕchē-ə,brĕchə,brĕsh- /
  1. A rock composed of angular fragments embedded in a fine-grained matrix. Breccias form from explosive volcanic ejections, the compaction of talus, or plate tectonic processes. Breccias are different from conglomerates in that the fragments they contain are angular instead of rounded.


Other Word Forms

Etymology

Origin of breccia

1765–75; < Italian < Germanic; compare Old High German brecha breaking

Vocabulary lists containing breccia

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

"This study revealed the importance of such breccia, which forms due to the erosion of seafloor mountains along mid-ocean ridges, as a sponge for carbon in the long-term carbon cycle."

From Science Daily Dec. 11, 2025

Most of the ejected material is called breccia - angular rocks cemented by clay.

From BBC Jul. 24, 2024

It was a breccia containing a nugget of anorthosite that apparently crystallized 4.46 billion years ago.

From Washington Post Apr. 21, 2022

The Pinnacles’ high peaks are mostly volcanic breccia, which is more vulnerable to crumbling, a different sort of challenge.

From Los Angeles Times Feb. 10, 2022

When any of these natural pit-falls happen to communicate with lines of subterranean caverns, the bones, earth, and breccia, may sink by their own weight, or be washed into the vaults below.

From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Lyell, Charles, Sir

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