class cycadopsida
English Thesaurus
1. palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta) (noun.plant)
| hypernym | : | class, |
| definition | : | (biology) a taxonomic group containing one or more orders (noun.group) |
| member holonym | : | cycadales, order cycadales, |
| definition | : | primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms (noun.plant) |
| member meronym | : | class gymnospermae, division gymnospermophyta, gymnospermae, gymnospermophyta, |
| definition | : | plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida) (noun.plant) |
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