plural noun

: 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

Word History


New Latin, from Pteropsis, genus of ferns (from pter- + -opsis) + -ida

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Dictionary Entries Near Pteropsida

Cite this Entry

“Pteropsida.” Dictionary, Merriam-Webster, Accessed 12 Apr. 2024.

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