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word-forming element meaning "same, the same, equal, like," before vowels hom-, from Greek homos "one and the same," also "belonging to two or more jointly," from PIE *somos (cf. Sanskrit samah "even, the same," Lithuanian similis "like," Gothic sama "the same," samana "together;" see same).
homo- or hom-
Same; like: homotype.
A prefix meaning "same," as in homogamous, having the same kind of flower.