heteroclite (adj.) Look up heteroclite at Dictionary.com
in reference to a word (especially a noun) irregularly inflected, 1570s, from French hétéroclite, from Late Latin heteroclitus, from Greek heteroklitos "irregularly inflected," from hetero- "different" (see hetero-) + verbal adjective from klinein "to lean" (see lean (v.)). Figuratively, of persons, "deviating from the ordinary," from 1590s.