The Collaborative International Dictionary
Hercogamous
Hercogamous \Her*cog"a*mous\, a. [Gr. ? a fence + ? marriage.] (Bot.) Not capable of self-fertilization; -- said of hermaphrodite flowers in which some structural obstacle forbids autogamy.
Wiktionary
hercogamous
a. (context botany English) Not capable of self-fertilization; said of hermaphrodite flowers in which some structural obstacle prevents autogamy.