Definitions
There is 1 meaning of the phrase
Class Gnetopsida.
Class Gnetopsida - as a noun
Gymnospermous flowering plants; supposed link between conifers and angiosperms; in some systems classified as a class (gnetopsida) and in others as a subdivision (gnetophytina or gnetophyta)
Synonyms (Exact Relations)
gnetophytagnetophytinagnetopsidasubdivision gnetophytina