Origin of milfoil
1250–1300; Middle English < Old French < Latin mīlifolium, equivalent to mīli-, combining form of mille thousand + folium leaf
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for milfoil
Milfoil, mil′foil, n. the herb yarrow, remarkable for the numerous divisions of its leaf.
C13: from Old French, from Latin milifolium, from mille thousand + folium leaf
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012