Hypertext Webster Gateway: "Pondweed"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Pondweed \Pond"weed`\, n. (Bot.)
Any aquatic plant of the genus {Potamogeton}, of which many
species are found in ponds or slow-moving rivers.
{Choke pondweed}, an American water weed ({Anarcharis, or
Elodea, Canadensis}.) See {Anacharis}.
{Horned pondweed}, the {Zannichellia palustris}, a slender,
branching aquatic plant, having pointed nutlets.
From WordNet (r) 1.7 (wn)
pondweed
n 1: any of several submerged or floating freshwater perennial
aquatic weeds belonging to the family Potamogetonaceae
2: submerged freshwater perennials [syn: {Elodea}, {genus
Elodea}, {ditchmoss}]
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