Milfoil
Pronunciation : Mil"foil
Part of Speech : n.
Etymology : [F. mille-feuille, L. millefolium; mille thousand + folium leaf. See Foil a leaf.] (Bot.)
Definition : Defn: A common composite herb (Achillea Millefolium) with white flowers and finely dissected leaves; yarrow. Water milfoil (Bot.), an aquatic herb with dissected leaves (Myriophyllum).
Source : Webster's Unabridged Dictionary, 1913