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[ih-jek-tuh] /ɪˈdʒɛk tə/
noun, (used with a singular or plural verb)
matter ejected, as from a volcano in eruption.
Origin of ejecta
1885-90; neuter plural of Latin ējectus. See eject Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for ejecta
  • They have punched through the ejecta blanket and so must have appeared after the formation of the large crater.
  • The size of the proto-solar system and its distance from the explosion determine how much of that radioactive ejecta mingles in.
  • Um, by way of less harmful and even beneficial organic ejecta during the late heavy bombardment, for example.
  • At bottom is the area covered by ejecta, or material blasted into the air.
  • Craters and debris, called ejecta, from millions of years ago are still crystal-clear on the moon's surface.
  • Known as ejecta rays, these features are more often seen on other planets and moons with thin atmospheres.
  • The surface ejecta became a ring around the planet that coalesced into the moon.
  • The ejecta travel through the atmosphere and may reach escape velocity.
  • Also, the area around the lake shows no signs of an ejecta blanket.
  • The total volume of the ejecta can be estimated by multiplying the magma discharge rate by the duration of the eruption.
British Dictionary definitions for ejecta


plural noun
matter thrown out of a crater by an erupting volcano or during a meteorite impact
Word Origin
C19: Latin, literally: (things) ejected; see eject
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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ejecta in Medicine

ejecta e·jec·ta (ĭ-jěk'tə)
Something that has been ejected from the body. Also called ejection.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ejecta in Science
Ejected matter, especially from an erupting volcano. Volcanic ejecta usually includes volcanic glass, ash, and rock fragments.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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