waterweed
nounUK /ˈwɔːtəwiːd/
US /ˈwɔːtərwiːd/
A waterweed is a green plant that grows in water.
The pond was full of waterweed near the shore.
OTHER MEANINGS
2. Any of various plants that grow submerged or floating in water, often forming dense mats.
Fishermen sometimes complain that waterweed clogs their lines.
3. A common name for certain species of the genus Elodea used in aquariums.
She planted waterweed in her fish tank to give the fish cover.
4. Weeds or unwanted plants growing in a body of water such as a canal or lake.
The city hired a crew to clear the waterweed from the canal.