atypical

US /ˌeɪˈtɪp.ɪ.kəl/
UK /ˌeɪˈtɪp.ɪ.kəl/
"atypical" picture
1.

atypique, inhabituel

not representative of a type, group, or class; unusual.

:
His response was atypical of his usual calm demeanor.
Sa réponse était atypique de son comportement calme habituel.
The patient presented with atypical symptoms.
Le patient a présenté des symptômes atypiques.