class psilopsida   (TTS Sound)

The noun class psilopsida has 1 sense

• Psilopsida, class Psilopsida, Psilotatae, class Psilotatae -- (whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs)