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[dahy-uh-treem] /ˈdaɪ əˌtrim/
noun, Geology.
a volcanic vent produced in a solid rock structure by the explosive energy of gases in magmas.
Origin of diatreme
1930-35; dia- + Greek trêma hole Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for diatreme
Historical Examples
  • Most maars have low rims composed of a mixture of loose fragments of volcanic rock and rocks torn from the walls of the diatreme.

    Volcanoes Robert I. Tilling
diatreme in Science
A volcanic pipe, filled with breccia, formed by a subterranean gaseous explosion. See illustration at batholith.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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