Found 2 items, similar to waterweed.
English → English (WordNet) Definition: waterweed waterweed n : a weedy aquatic plant of genus Elodea
English → English (gcide) Definition: waterweed Anacharis \An*ach"a*ris\, n. [NL., fr. Gr. ? up + ? grace.] (Bot.) A fresh-water weed of the frog's-bit family (Hydrocharidace[ae]), native to America. Transferred to England it became an obstruction to navigation. Called also waterweed and water thyme. [1913 Webster]