| Noun | 1. | genus Hydrocharis - frogbit liliopsid genus, monocot genus - genus of flowering plants having a single cotyledon (embryonic leaf) in the seed family Hydrocharidaceae, family Hydrocharitaceae, frogbit family, frog's-bit family, Hydrocharidaceae, Hydrocharitaceae - simple nearly stemless freshwater aquatic plants; widely distributed frogbit, frog's-bit, Hydrocharis morsus-ranae - European floating plant with roundish heart-shaped leaves and white flowers |