clast

noun

ˈklast 

: a fragment of rock

Examples of clast in a Sentence

Recent Examples on the Web

When cracks form, water dissolves calcium-rich material from the clasts, which then recrystallizes as calcium carbonate, sealing the fracture. — Sam MacDonald, Scientific American, 11 July 2026

Because limestone is rich in calcium, these clasts act as calcium reservoirs. — Encyclopedia Britannica, 9 July 2026

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

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