from the GNU version of the Collaborative International Dictionary of English
- adj. an American fern (Onoclea sensibilis), the leaves of which, when plucked, show a slight tendency to fold together.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. beautiful spreading fern of eastern North America and eastern Asia naturalized in western Europe; pinnately divided fronds show a slight tendency to fold when touched; pinnules enclose groups of sori in beadlike lobes
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