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Noun floating fern has 3 senses
- floating fern, Ceratopteris thalictroides - pantropical aquatic fern
--1 is a kind of aquatic fern, water fern
--1 is a member of Ceratopteris, genus Ceratopteris
- floating fern, water sprite, Ceratopteris pteridioides - aquatic fern of tropical America often used in aquariums
--2 is a kind of aquatic fern, water fern
--2 is a member of Ceratopteris, genus Ceratopteris
- mosquito fern, floating fern, Carolina pond fern, Azolla caroliniana - small free-floating aquatic fern from the eastern United States to tropical America; naturalized in western and southern Europe
--3 is a kind of aquatic fern, water fern
--3 is a member of Azolla, genus Azolla
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