Noun sphenopsida has 1 sense
  1. Sphenopsida, class Sphenopsida, Equisetatae, class Equisetatae - horsetails and related forms
    --1 is a kind of class
    --1 is a member of Pteridophyta, division Pteridophyta
    --1 has members: Equisetales, order Equisetales
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