aberrant🔊

Differing from the norm. +

(sometimes figuratively) Straying from the right way; deviating from morality or truth. +

(botany, zoology) Deviating from the ordinary or natural type; exceptional; abnormal.

A person or object that deviates from the rest of a group.

(biology) A group, individual, or structure that deviates from the usual or natural type, especially with an atypical chromosome number.