The Collaborative International Dictionary
Heteroclitical
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.
Wiktionary
heteroclitical
a. (context obsolete English) anomalous, heteroclite.