[ dahy-uh-treem ]

  1. 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

Words Nearby diatreme

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use diatreme in a sentence

  • 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

Scientific definitions for diatreme


[ ə-trēm′ ]

  1. A volcanic pipe, filled with breccia, formed by a subterranean gaseous explosion. See illustration at batholith.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.