'class Gnetopsida' definitions:

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) [syn: Gnetopsida, class Gnetopsida, Gnetophytina, subdivision Gnetophytina, Gnetophyta]