- Noun: gymnosperm 'jimnu`spurm
- Plants of the class Gymnospermae having seeds not enclosed in an ovary
Derived forms: gymnosperms
See also: gymnospermous
n : any of a class or subdivision (Gymnospermae) of woody vascular seed plants (as conifers or cycads) that produce naked seeds not enclosed in an ovary and that in some instances have motile spermatozoids —compare ANGIOSPERM — gym·no·sper·mous adj
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- its native gymnosperms could evolve into a few species capable of growing in the warm, moist forests of queensland.
- the occurrence of haploid endosperm in the gymnosperms provides a sound basis for further investigations into progenies.
- most angiosperm ovules possess two integuments, while gymnosperms usually have only one
- most gymnosperms retain archegonia except for the most advanced genera gnetum and welwitschia
- antherozoid ( spermatozoid ) the male gamete of algae, some gymnosperms, and the non-seed-bearing plants