• synonyms


noun Geology.
  1. a volcanic vent produced in a solid rock structure by the explosive energy of gases in magmas.
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Origin of diatreme

1930–35; dia- + Greek trêma hole
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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.


    Robert I. Tilling

diatreme in Science


  1. A volcanic pipe, filled with breccia, formed by a subterranean gaseous explosion. See illustration at batholith.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.