royal fern

royal fern

n. A fern (Osmunda regalis) of worldwide distribution, having tall fronds with widely spaced oblong leaflets.

royal fern

n (Plants) a fern, Osmunda regalis, of damp regions, having large fronds up to 2 metres (7 feet) in height, some of which are modified for bearing spores: family Osmundaceae

roy′al fern′

n. a tall, coarse osmunda fern, Osmunda regalis, having large, upright fronds, growing in wetland areas. [1770–80]

Thesaurus

Noun

1.

royal fern - large deeply rooted fern of worldwide distribution with upright bipinnate compound tufted frondsditch fern, French bracken, Osmunda regalis, royal osmund, king fernosmund, flowering fern - any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters