Definitions

from The American HeritageĀ® Dictionary of the English Language, 4th Edition

  • n. Any of various ferns of the widespread genus Cystopteris, having pinnately compound fronds and often growing in rocky areas.

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

  • n. any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori

Etymologies

After its bladderlike indusium.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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