The Collaborative International Dictionary
Heterogamous \Het`er*og"a*mous\, a. [Hetero- + Gr. ga`mos marriage: cf. F. h['e]t['e]rogame.] (Bot. & Biol.)
The condition of having two or more kinds of flowers which differ in regard to stamens and pistils, as in the aster.
Characterized by heterogamy.
Wiktionary
a. 1 (context botany English) in which the stamens and pistils are not present in every flower; i.e. there are male and female flowers 2 #in the daisy family Asteraceae, having two types of flowers in a flower head (such as some sterile, some hermaphrodite, or some female, some hermaphrodite) 3 (context biology English) characterized by alternating generations of a parthenogenetic and sexual nature 4 (context biology English) involving heterogametes in the reproductive process