waterweed
/ˈwɔːtəwiːd/noun
mass noun
1
- any aquatic plant with inconspicuous flowers水草。
2
- a submerged aquatic American plant which is grown in ornamental ponds伊乐藻。
2.1
- Genus Elodea, family Hydrocharitaceae: several species, in particular Canadian pondweed.伊乐藻属, 水鳖科：数种, 尤指加拿大的眼子菜。