へんい 変異 LinksSentence search for 変異Sentence search for へんいKanji details for 変 and 異Edit in JMdict Noun1. unusual occurrenceNoun, Suru verb, Intransitive verb2. variationBiologyNoun, Suru verb, Intransitive verb3. mutationBiology, See also 突然変異 Discussions Log in to talk about this word.