'class Psilotatae' definitions:

Definition of 'class Psilotatae'

(from WordNet)
noun
Whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs [syn: Psilopsida, class Psilopsida, Psilotatae, class Psilotatae]