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|Noun||1.||family Hydrocharidaceae - simple nearly stemless freshwater aquatic plants; widely distributed|
liliopsid family, monocot family - family of flowering plants having a single cotyledon (embryonic leaf) in the seed
Alismales, Naiadales, order Alismales, order Naiadales - an order of aquatic monocotyledonous herbaceous plants
genus Hydrilla - one species