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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Origin and Etymology of gymnospermae
New Latin, from gymn- + -spermae
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