Akademik

floating fern

noun

1. small free-floating aquatic fern from the eastern United States to tropical America; naturalized in western and southern Europe

• Syn: ↑mosquito fern, ↑Carolina pond fern, ↑Azolla caroliniana

• Hypernyms: ↑aquatic fern, ↑water fern

• Member Holonyms: ↑Azolla, ↑genus Azolla

2. aquatic fern of tropical America often used in aquariums

• Syn: ↑water sprite, ↑Ceratopteris pteridioides

• Hypernyms: ↑aquatic fern, ↑water fern

• Member Holonyms: ↑Ceratopteris, ↑genus Ceratopteris

3. pantropical aquatic fern

• Syn: ↑Ceratopteris thalictroides

• Hypernyms: ↑aquatic fern, ↑water fern

• Member Holonyms: ↑Ceratopteris, ↑genus Ceratopteris

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noun

1. : any of several aquatic ferns of the genus Ceratopteris (especially C. thalictroides and C. pteridoides) often used in aquariums — called also water sprite

2. : floating moss; also : a related plant (Azolla caroliniana)

Useful english dictionary. 2012.