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Any of several tropical aquatic plants of the genus Eichhornia, especially the widespread species E. crassipes, originally of South America, which forms dense floating masses in rivers and lakes and has large bluish-purple flowers and leafstalks with greatly inflated bases.
(Plants) a floating aquatic plant, Eichhornia crassipes, of tropical America, having showy bluish-purple flowers and swollen leafstalks: family Pontederiaceae. It forms dense masses in rivers, ponds, etc, and is a serious problem in the southern US, Australia, and parts of Africa
a floating freshwater plant, Eichornia crassipes, related to the pickerelweed, that grows so prolifically it often hinders the passage of boats.
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|Noun||1.||water hyacinth - a tropical floating aquatic plant having spikes of large blue flowers; troublesome in clogging waterways especially in southern United States|