Source : Webster's Revised Unabridged Dictionary (1913)

Osmund \Os"mund\, n. (Bot.)
   A fern of the genus {Osmunda}, or flowering fern. The most
   remarkable species is the {osmund royal}, or {royal fern}
   ({Osmunda regalis}), which grows in wet or boggy places, and
   has large bipinnate fronds, often with a panicle of capsules
   at the top. The rootstock contains much starch, and has been
   used in stiffening linen.

Source : WordNet®

osmund
     n : any fern of the genus Osmunda: large ferns with creeping
         rhizomes; naked sporangia are on modified fronds that
         resemble flower clusters [syn: {flowering fern}]