"having no distinct or typical character," 1847, from a- (3) "not" + typical. Related: Atypically.
a class of atypical mosses
atypical behavior is not the accepted type of response that we expect from children
these days large families are atypical
atypical clinical findings
atypical pneumonia
atween
atwirl
atwist
atwitter
atwixt
atypical
Au
au
*au-
au courant
au fait