noun
unusual occurrence; anomaly
General term for something that deviates from the norm; often used in formal or technical descriptions of abnormal events.
今年の気候には変異が見られる。
This year's climate shows unusual occurrences.
noun, noun or participle which takes 'suru', intransitive verb
Biology term for genetic variation or mutation; also used as a suru-verb (intransitive). Often appears in compounds like 突然変異 (sudden mutation).
この種は環境に応じて変異する。
This species varies according to the environment.
突然変異が進化の原動力となる。
Mutations drive evolution.