heteroclitical

from The Collaborative International Dictionary of English v.0.48

Heteroclitic \Het`er*o*clit"ic\, Heteroclitical
\Het`er*o*clit"ic*al\, a. [See {Heteroclite}.]
   Deviating from ordinary forms or rules; irregular; anomalous;
   abnormal.
   [1913 Webster]