
• Either of several tropical aquatic plants of the genus Eichhornia, related to the pickerel weed.
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http://thinkexist.com/dictionary/meaning/water_hyacinth/

any aquatic plant of the genus Eichhornia of the pickerelweed family (Pontederiaceae), consisting of about five species, native primarily to ... [2 related articles]
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http://www.britannica.com/eb/a-z/w/13

(Eichhornia) These tender, aquatic perennials, commonly known as Water Hyacinths are natives of South America. These pretty plants easily reproduce and can become a huge nuisance if care is not taken. In some states they are illegal to sell and it is illegal to transport them from state to state. Water Hyacinths multiply so quickly that they can ch...
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http://www.encyclo.co.uk/local/10004
Wa'ter hy'a·cinth (Botany) Either of several tropical aquatic plants of the genus
Eichhornia , related to the pickerel weed.
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http://www.encyclo.co.uk/webster/W/13

[
n] - a tropical floating aquatic plant having spikes of large blue flowers
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http://www.webdictionary.co.uk/definition.php?query=water%20hyacinth
water orchid noun a tropical floating aquatic plant having spikes of large blue flowers; troublesome in clogging waterways especially in southern United States
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https://www.encyclo.co.uk/local/20974

Tropical aquatic plant belonging to the pickerelweed family. In one growing season 25 plants can produce 2 million new plants. It is liable to choke waterways, removing nutrients from the water and blocking out the sunlight, but it can be used to purify sewage-polluted water as well as in making methane gas, compost, concentrated protein, paper...
Found on
https://www.encyclo.co.uk/local/21221
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