| / English Dictionary |
CLASS PTERIDOSPERMOPSIDA
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
Extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies
Synonyms:
class Pteridospermopsida; Pteridospermopsida
Classified under:
Hypernyms ("class Pteridospermopsida" is a kind of...):
class ((biology) a taxonomic group containing one or more orders)
Meronyms (members of "class Pteridospermopsida"):
Cycadofilicales; Lyginopteridales; order Cycadofilicales; order Lyginopteridales (fossil gymnospermous trees or climbing plants from the Devonian: seed ferns)
Holonyms ("class Pteridospermopsida" is a member of...):
class Gymnospermae; division Gymnospermophyta; Gymnospermae; Gymnospermophyta (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))
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