polypodium

from WordNet (r) 3.0 (2006)

Polypodium
    n 1: a genus of ferns belonging to the family Polypodiaceae and
         having rounded naked sori [syn: {Polypodium}, {genus
         Polypodium}]

from The Collaborative International Dictionary of English v.0.48

Polypodium \Pol"y*po`di*um\, n. [L., fr. Gr. ?, dim. of ?. See
   {Polyp}, and cf. 2d {Polypode}.] (Bot.)
   A genus of plants of the order {Filices} or ferns. The
   fructifications are in uncovered roundish points, called
   sori, scattered over the inferior surface of the frond or
   leaf. There are numerous species.
   [1913 Webster]