Noun has 3 senses

• floating fern(n = noun.plant) ceratopteris thalictroides - pantropical aquatic fern;



• floating fern(n = noun.plant) ceratopteris pteridioides, water sprite - aquatic fern of tropical America often used in aquariums;



• floating fern(n = noun.plant) azolla caroliniana, carolina pond fern, mosquito fern - small free-floating aquatic fern from the eastern United States to tropical America; naturalized in western and southern Europe;