資料來源 : WordNet®

subdivision Gnetophytina
     n : 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}, {Gnetophyta}]