The Collaborative International Dictionary
Gymnogen
Gymnogen \Gym"no*gen\ (j[i^]m"n[-o]*j[e^]n), n. [Gr. gymno`s naked + -gen.] (Bot.) One of a class of plants, so called by Lindley, because the ovules are fertilized by direct contact of the pollen. Same as Gymnosperm.
Wiktionary
gymnogen
n. A gymnosperm.