"Heteroclitous" is a word in ENGLISH

A combining form signifying other, other than usual, different; as, heteroclite, heterodox, heterogamous.

Deviating from ordinary forms or rules; irregular; anomalous; abnormal.

A word which is irregular or anomalous either in declension or conjugation, or which deviates from ordinary forms of inflection …

Any thing or person deviating from the common rule, or from common forms.

Alt. of Heteroclitical

Deviating from ordinary forms or rules; irregular; anomalous; abnormal.