Where does “alomorfo” come from?

alomorfo (Spanish) comes from Spanish alo-, from Ancient Greek ἀλλο-, from Ancient Greek ἄλλος, from Ancient Greek κρίνω, from Proto-Hellenic kríňňō, from Proto-Indo-European krinyéti, from Proto-Indo-European krey- — to sift, separate, divide.

alomorfo (Spanish): allomorph phonological representation of a morpheme