waterweed

noun

Any of various submersed aquatic plants, especially of the genera Elodea and Egeria.

noun

Any wild aquatic plant without special use or beauty.

noun

Specifically, the choke-pondweed or water-thyme, Elodea Canadensis (Anacharis Alsinas-trum), of the Hydrocharideæ. See pondweed and Babington’s-curse.

noun

See anacharis.

noun

Any of several aquatic herbs of the genus Elodea

noun

a weedy aquatic plant of genus Elodea