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1 definition found

From: WordNet (r) 2.0

 floating fern
      n 1: pantropical aquatic fern [syn: Ceratopteris thalictroides]
      2: aquatic fern of tropical America often used in aquariums
         [syn: water sprite, Ceratopteris pteridioides]
      3: 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]