'Horned pondweed' definitions:

Definition of 'horned pondweed'

From: WordNet
noun
Found in still or slow-moving fresh or brackish water; useful to oxygenate cool water ponds and aquaria [syn: horned pondweed, Zannichellia palustris]

Definition of 'Horned pondweed'

From: GCIDE
  • 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]