from the GNU version of the Collaborative International Dictionary of English
- adj. a genus of showy ferns (Osmunda), with conspicuous bivalvular sporangia. They usually grow in wet places.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters
- n. Australasian fern with clusters of sporangia on stems of fertile fronds
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