Definition of Pteropsida
: a subdivision of Tracheophyta comprising vascular plants (as the ferns and flowering plants) with well-developed and typically large leaves, leaf gaps usually present in the primary vascular cylinder, and sporangia abaxial on normal or modified leaves and including the classes Filicineae, Gymnospermae, and Angiospermae — compare lycopsida, psilopsida, sphenopsida
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Origin and Etymology of pteropsida
New Latin, from Pteropsis, genus of ferns (from pter- + -opsis) + -ida
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