frog·bit, frog's-bit n. Bot. (a) 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. (b) An American plant (Limnobium Spongia), with similar habits.
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  frogbit
       n : European floating plant with roundish heart-shaped leaves
           and white flowers [syn: frog's-bit, Hydrocharis
           morsus-ranae]