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noun (used with a singular or plural verb)
  1. matter ejected, as from a volcano in eruption.
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Origin of ejecta

1885–90; neuter plural of Latin ējectus. See eject
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for ejecta


pl n
  1. matter thrown out of a crater by an erupting volcano or during a meteorite impact
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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

ejecta in Medicine


  1. Something that has been ejected from the body.ejection
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

ejecta in Science


  1. Ejected matter, especially from an erupting volcano. Volcanic ejecta usually includes volcanic glass, ash, and rock fragments.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.