mutation (n.)youdaoicibaDictYouDict[mutation 词源字典]
late 14c., "action of changing," from Old French mutacion (13c.), and directly from Latin mutationem (nominative mutatio) "a changing, alteration, a turn for the worse," noun of action from past participle stem of mutare "to change" (see mutable). Genetic sense is from 1894.[mutation etymology, mutation origin, 英语词源]