atypical

adjective

1. not typical; not conforming to the type; irregular; abnormal: atypical behavior; a flower atypical of the species.

adjective

1. not typical; deviating from or not conforming to type

adj.

1847, from a- (2) “not” + typical. Related: Atypically.

adj.

1. Not corresponding to the normal form or type; not typical.