frog's-bit

[ frogz-bit, frawgz- ]
/ ˈfrɒgzˌbɪt, ˈfrɔgz- /

noun

an aquatic, floating plant, Hydrocharis morsus-ranae, of Eurasia, having thick, roundish, spongy leaves.
an aquatic, floating plant, Limnobium spongia, of tropical America, having reddish-brown spotted, oblong, heart-shaped, or ovate leaves.
Also frogbit.

Origin of frog's-bit

First recorded in 1570–80

British Dictionary definitions for frog-bit

frog-bit

noun

a floating aquatic Eurasian plant, Hydrocharis morsus-ranae, with heart-shaped leaves and white flowers: family Hydrocharitaceae