Definition of ostrich fern
: any of a genus (Matteuccia) of temperate-zone ferns
especially
: a tall fern (M. struthiopteris) with graceful arched fronds which are the source of edible fiddleheads
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Merriam-Webster unabridged
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Time Traveler for ostrich fern
The first known use of ostrich fern was in 1833
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