water milfoil

noun

1. any of various aquatic plants, chiefly of the genus Myriophyllum, the submerged leaves of which are very finely divided.

water milfoil

noun

1. any of various pond plants of the genus Myriophyllum, having feathery underwater leaves and small inconspicuous flowers: family Haloragidaceae

Word History and Origins

Origin of water milfoil¹

First recorded in 1570–80