Pondweed \Pond"weed`\, n. (Bot.)
Any aquatic plant of the genus {Potamogeton}, of which many
species are found in ponds or slow-moving rivers.
[1913 Webster]
{Choke pondweed}, an American water weed ({Anarcharis
Canadensis}, syn. {Elodea Canadensis}.) See {Anacharis}.
{Horned pondweed}, the {Zannichellia palustris}, a slender,
branching aquatic plant, having pointed nutlets.
[1913 Webster]