Also found in: Thesaurus.
Switch to new thesaurus
|Noun||1.||class Sphenopsida - horsetails and related forms|
class - (biology) a taxonomic group containing one or more orders
division Pteridophyta, Pteridophyta - containing all the vascular plants that do not bear seeds: ferns, horsetails, club mosses, and whisk ferns; in some classifications considered a subdivision of Tracheophyta
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.