1.
[syn: frogbit, frog's-bit, Hydrocharis morsus-ranae]
The Collaborative International Dictionary of English v.0.48:
frogbit \frog"bit`\, frog's-bit \frog's-bit\, n. (Bot.)
(a) A European plant (Hydrocharis Morsus-ran[ae]),
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.
[1913 Webster]
WordNet (r) 3.0 (2006):
frogbit
n 1: European floating plant with roundish heart-shaped leaves
and white flowers [syn: frogbit, frog's-bit,
Hydrocharis morsus-ranae]