water milfoil

Definitions of water milfoil

1. noun

   an aquatic plant of the genus Myriophyllum having feathery underwater leaves and small inconspicuous flowers
   type of:

   aquatic plant, hydrophyte, hydrophytic plant, water plant

   a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth