English > aquatic fern: 1 sense > noun 1, plant| Meaning | ferns that grow in water. |
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| Synonym | water fern |
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| Narrower | clover fern, pepperwort | Any of several water ferns of the genus Marsilea having four leaflets |
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| floating-moss, Salvinia rotundifolia, Salvinia auriculata | Free-floating aquatic ferns |
| floating fern, water sprite, Ceratopteris pteridioides | aquatic fern of tropical America often used in aquariums |
| floating fern, Ceratopteris thalictroides | pantropical aquatic fern |
| mosquito fern, floating fern, Carolina pond fern, Azolla caroliniana | small free-floating aquatic fern from the eastern United States to tropical America |
| pillwort, Pilularia globulifera | European water fern found around margins of bodies of water or in wet acid soil having small globose sporocarps |
| regnellidium, Regnellidium diphyllum | small latex-containing aquatic fern of southern Brazil |
| Broader | fern | Any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward |
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