1805, "condition of bearing flowers that do not differ sexually," from homo- (1) "same" + -gamy.
Entries linking to homogamy
homo- 1
before vowels hom-, word-forming element meaning "same, the same, equal, like" (opposed to hetero-), from Greek homos "one and the same," also "belonging to two or more jointly" (from PIE *somo-, from root *sem- (1) "one; as one, together with").
-gamy
word-forming element meaning "marriage" in anthropology and "fertilization" in biology, from Greek -gamia, from gamos "marriage" (see gamete).
homogamous adj.
1811, in botany, from homogamy + -ous. Greek homogamos meant "married to the same wife; having married sisters."