The Collaborative International Dictionary
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
a. 1 (context linguistics English) In linguistics, particularly Indo-European Studies, signifying a stem which alternates between more than one form when declined for grammatical case. Examples of heteroclitic noun stems in Proto-Indo-European include '''*wod-r/n-''' "water" (nominoaccusative '''*wódr'''; genitive '''*udnés'''; locative '''*udén''') and '''*yékw-r/n-''' "liver" (nominoaccusative '''*yékwr''', genitive '''*ikwnés'''). In Proto-Indo-European, heteroclitic stems tend to be noun stems with grammatically inanimate gender. 2 (rfdef: English) n. A #English noun.
Usage examples of "heteroclitic".
Here a high narrow door, engraved with heteroclitic ciphers, gave admission to a huge room without windows, lit by a yellow glow whose cause was not ascertainable.