Frogbit

Origin

frog + bit?

Full definition of frogbit

Noun

1. A European plant, Hydrocharis morsus-ranae, with roundish leaves and small white flowers, that floats on still water and propagates itself by runners.
2. An American plant, Limnobium spongia, with similar propagation.
3. A South American plant, Limnobium laevigatum.