Search Result for "psilopsida": 
Wordnet 3.0

NOUN (1)

1. 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]


WordNet (r) 3.0 (2006):

Psilopsida n 1: 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]