The Collaborative International Dictionary of English v.0.48:

Imparidigitate \Im*par`i*dig"i*tate\, a. [L. impar unequal +
   digitus finger.] (Anat.)
   Having an odd number of fingers or toes, either one, three,
   or five, as in the horse, tapir, rhinoceros, etc.
   [1913 Webster]