in Grammar, an irregular or anomalous word, which, either in declension, conjugation, or regimen, deviates from the ordinary rules of grammar. The word is Greek, ἑτεροκλίτης, formed from ἕτερος, alter, another, different, and κλίνω, I decline. Heteroclite is more peculiarly applied to nouns which vary or are irregular in point of declension.