Definition of water fern in English:

water fern

Line breaks: water fern

noun

  • 1A small aquatic or semiaquatic fern which is either free-floating or anchored by the roots, found chiefly in tropical and warm countries.
    • Families Azollaceae, Marsileaceae and Salviniaceae: many species, in particular the minute floating Azolla filiculoides of tropical America, which has been naturalized elsewhere
    More example sentences
    • Genomic downsizing is suggested for the heterosporous water ferns and for the aquatic fern Ceratopteris.
    • However, both water ferns and Selaginella are also heterosporous, unlike any other pteridophytes except Isoetales.
    • Thick mass of Trapa, an economically important free floating plant called Singhari by the local people, besides water ferns, duckweeds etc can be seen almost everywhere.
  • 2An Australian fern with large coarse fronds, typically growing in marshy areas and rainforests.
    • Genus Blechnum, family Blechnaceae: several species

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a slit made by cutting with a saw