- any of various aquatic plants, chiefly of the genus Myriophyllum, the submerged leaves of which are very finely divided.
Origin of water milfoil
First recorded in 1570–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any of various pond plants of the genus Myriophyllum, having feathery underwater leaves and small inconspicuous flowers: family Haloragidaceae