Definitions

from The Century Dictionary.

  • noun A small genus of boreal polypodiaceous ferns, the rock-brakes, distinguished from Pellæa mainly by their dimorphic fronds.

from the GNU version of the Collaborative International Dictionary of English.

  • noun a genus sometimes placed in the family Polypodiaceae or Cryptogrammataceae.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun sometimes placed in family Polypodiaceae or Cryptogrammataceae

Etymologies

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