Gymnospermae

plural noun
Gym·no·sper·mae

Definition of Gymnospermae 

: a class of Pteropsida or in some classifications a subdivision of Spermatophyta comprising seed plants (as cycads and conifers) that produce naked seeds not enclosed in an ovary and in some instances have motile spermatozoids and including the subclasses Cycadophyta and Coniferophytae — compare angiospermae , filicineae

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History and Etymology for Gymnospermae

New Latin, from gymn- + -spermae

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occurring twice a year or every two years

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