class psilopsida is a noun meaning "whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs". It carries one recorded sense.
whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs
Definitions, synonyms and semantic relations for class psilopsida come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.