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[myoot-nt] /ˈmyut nt/
undergoing or resulting from mutation.
a new type of organism produced as the result of mutation.
Origin of mutant
1900-05; < Latin mūtant- (stem of mūtāns), present participle of mūtāre to change; see -ant
Related forms
unmutant, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for mutant
  • It's not unusual for plants to produce mutant fruit that lacks seeds, but these fruits are usually the end of their line.
  • The game features a pair of mercenaries betrayed by their group leader and banished to a mutant-riddled planet.
  • By the time a gargantuan mutant rat starts attacking people, it may already be too late for them to stop it.
  • Futurama's crew includes an alien, a mutant, and a robot.
  • All it takes is a few mutant microbes to cause trouble.
  • To get the effects of the disease, you need to have two mutant copies of the gene.
  • When they introduced all of their compounds into these mutant bacteria, they found that some cells indeed survived.
  • It took five years for them to create a mutant plant that had lost its ability to sense temperature correctly.
  • Then nature produces a mutant that can overcome this resistance.
  • Regarding the last sentence suggesting the making of a mutant, it can be a sweet dream and nightmare to become one.
British Dictionary definitions for mutant


Also called mutation. an animal, organism, or gene that has undergone mutation
of, relating to, undergoing, or resulting from change or mutation
Word Origin
C20: from Latin mutāre to change
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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Word Origin and History for mutant

1901, in the biological sense, from Latin mutantem (nominative mutans) "changing," present participle of mutare "to change" (see mutable). In the science fiction sense, it is attested from 1954. As an adjective from 1903.

Online Etymology Dictionary, © 2010 Douglas Harper
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mutant in Medicine

mutant mu·tant (myōōt'nt)
An organism possessing one or more genes that have undergone mutation. adj.
Resulting from or undergoing mutation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for mutant



A weird and disgusting person; shpos: Marvin is a mutant; he's constantly licking his nose in public (1980s+ Student)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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mutant in Technology
Microsoft's term for a mutex which is generally used in user mode but can also be used in kernel mode. According to this terminology a mutex is only used in kernel mode.
["Microsoft Windows NT Workstation Resource Kit"].
The Free On-line Dictionary of Computing, © Denis Howe 2010
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