Having no distinct typical character; not typical; not conformable to the type.

Producing a loss of typical characters. Dana.

adjective. That has no type; devoid of typical character; irregular; unlike the type.

adjective. that has no type; devoid of typical character; irregular; unlike the type

"Among the older naturalists, such as Pliny and Aristotle, and even in the older historians, whose scope included natural as well as civil and political history, the atypic and bizarre, and especially the aberrations of form or function of the generative organs, caught the eye most quickly."

atypical  

Philippic  phenotypic  philippic  

irregular