Definition of clast
: a fragment of rock
Recent Examples of clast from the Web
Researchers believe that the serpentine found in the clasts could form at depths of up to 12.5 miles down, where the subducting slab lies below the volcano.
There is a lot of great information on the eruption on a website hosted by the University of Tokyo (Japanese – try Google Translate) that has compositional data and images of clasts from the eruption –
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'clast.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of clast
Greek klastos broken, from klan to break; perhaps akin to Latin clades disaster
First Known Use: 1952See Words from the same year
Seen and Heard
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