• WordNet 3.6
    • n frogbit European floating plant with roundish heart-shaped leaves and white flowers
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Webster's Revised Unabridged Dictionary
    • n frogbit (Bot) A European plant (Hydrocharis Morsus-ranæ), floating on still water and propagating itself by runners. It has roundish heart-shaped leaves and small white flowers.
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Century Dictionary and Cyclopedia
    • n frogbit The Hydrocharis Morsus-ranæ, a floating aquatic plant of Europe, with round-reniform leaves and white flowers.
    • n frogbit The Limnobium Spongia, a very similar plant of the United States. Also frog's-bit.
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In news:

Volunteers pull European Frogbit to save bay.
European Frogbit came into Lake Champlain from the north, down the St Lawrence Seaway.