atypical
adjective
1. not representative of a group, class, or type
- a class of atypical mosses
- atypical behavior is not the accepted type of response that we expect from children
Similar word(s): uncharacteristic, abnormal, unnatural, unrepresentative, atypic, untypical
2. deviating from normal expectations; somewhat odd, strange, or abnormal
- these days large families are atypical
- atypical clinical findings
- atypical pneumonia
noun
1. (pharmacy) An atypical antipsychotic.