clast

noun

ˈklast 

: a fragment of rock

Examples of clast in a Sentence

Recent Examples on the Web

Recent research suggests the material contains lime clasts that can react with water and help seal cracks over time, effectively giving the concrete self-healing properties. — Kaif Shaikh, Interesting Engineering, 30 May 2026

The method created white chunks called lime clasts, and when water seeped in, those clasts would dissolve and reform into calcium carbonate, allowing the concrete to heal and seal the damage. — Andrea Margolis, FOXNews.com, 23 Dec. 2025

Water was then added, creating a chemical reaction that produced heat and trapped the lime clasts in the concrete. — Taylor Nicioli, CNN Money, 19 Dec. 2025

Using modern micro-CT scanning, which employed medical-level scans on the previously untouched core samples from the Light Mantle, Magnarini and her colleagues investigated clasts, which are rocky fragments that broke off from the slope of South Massif. — Keith Cooper, Space.com, 22 Aug. 2025

Word History

Etymology

probably back-formation from clastic

First Known Use

1952, in the meaning defined above

Rhymes for clast

• bast
• blast
• cast
• caste
• classed
• fast
• gassed
• gast
• glassed
• grassed
• hast
• last