Mutant

google

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early 20th century: from Latin mutant- ‘changing’, from the verb mutare .

wiktionary

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From Latin mūtāns, present participle of mūtō.

etymonline

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mutant (n.)

1900 in the biological sense, "individual or form which has arisen by or undergone (genetic) mutation," from Latin mutantem (nominative mutans) "changing," present participle of mutare "to change" (from PIE root *mei- (1) "to change, go, move"). In the science fiction sense, it is attested by 1954. As an adjective from 1903.