Definition of pyroclastic
: formed by or involving fragmentation as a result of volcanic or igneous action
Recent Examples of pyroclastic from the Web
As much as 20% of the island was covered in ash from the pyroclastic flows and fallout from the eruption.
During an overflight on 13 May, evidence of pyroclastic flows on the N flank was observed.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pyroclastic'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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