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Definition of "pyroclastic" []

  • Composed chiefly of rock fragments of volcanic origin. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "pyroclastic" in a sentence
  • "The heavier particles stay close to the ground and roll downhill in what we call a pyroclastic flow."
  • "Hundreds of thousands of people live beneath it and could be hit with what are known as pyroclastic flows -- extremely fast-moving, dense clouds of hot ash and rock that flow down the mountain."
  • "At least 90 people were killed as a superheated clouds of ash, gas and debris known as pyroclastic flows tumbled down the mountain and incinerated villages."
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