ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
: any of several floating or submerged aquatic plants: as
a. : an American plant ( Elodea canadensis ) that has elongate branching stems and small opposite or verticillate leaves and is naturalized in parts of Europe ; broadly : any plant of the genus Elodea
b. : a California primrose willow ( Jussiaea californica )