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