Noun genus lemna has 1 sense
  1. Lemna, genus Lemna - minute aquatic herbs floating on or below the water surface of still water consisting of a leaflike frond or plant body and single root
    --1 is a kind of monocot genus, liliopsid genus
    --1 is a member of Lemnaceae, family Lemnaceae, duckweed family
    --1 has members:
     common duckweed, lesser duckweed, Lemna minor; star-duckweed, Lemna trisulca
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