from The Century Dictionary and Cyclopedia
- An order of vascular cryptogamic plants of the phylum Pteridophyta, coördinate with the Filicales and Equisetales.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. lower vascular plants coextensive with the family Lycopodiaceae; in some classifications includes the Selaginellaceae and Isoetaceae
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