mu·​ta·​gen | \ ˈmyü-tə-jən How to pronounce mutagen (audio) \

Definition of mutagen

: an agent (such as a chemical or various radiations) that tends to increase the frequency or extent of mutation

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Other Words from mutagen

mutagenic \ ˌmyü-​tə-​ˈje-​nik How to pronounce mutagen (audio) \ adjective
mutagenically \ ˌmyü-​tə-​ˈje-​ni-​k(ə-​)lē How to pronounce mutagen (audio) \ adverb

Examples of mutagen in a Sentence

Recent Examples on the Web The fallout leads to three samples of an experimental mutagen dropping through the atmosphere and landing on Earth, where a wolf, an alligator, and George are all infected. Tasha Robinson, The Verge, "Rampage is laughably dumb, but at least there’s plenty of rampaging," 11 Apr. 2018 The main villain is not Shredder, but instead a cat named Old Hob, who was also transformed by the same mutagen that brought The Turtles to their current state. Dak, WIRED, "GeekMom: Comic Book Corner — June 20th, 2012," 20 June 2012

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mutagen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of mutagen

1933, in the meaning defined above

History and Etymology for mutagen

International Scientific Vocabulary mutation + -gen

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Time Traveler for mutagen

Time Traveler

The first known use of mutagen was in 1933

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Statistics for mutagen

Cite this Entry

“Mutagen.” Dictionary, Merriam-Webster, Accessed 8 May. 2021.

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More Definitions for mutagen


mu·​ta·​gen | \ ˈmyüt-ə-jən How to pronounce mutagen (audio) \

Medical Definition of mutagen

: a substance (as a chemical or various radiations) that tends to increase the frequency or extent of mutation

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