Lycopsida
plural noun
Ly·cop·si·da
līˈkäpsədə
: a subdivision of Tracheophyta coextensive with the class Lycopodineae comprising vascular plants (as the club mosses and related forms) with small leaves, sessile and adaxial sporangia, and no leaf gaps in the primary vascular cylinder compare psilopsida , pteropsida , sphenopsida
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Merriam-Webster unabridged
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