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milfoil Syllabification: mil·foil
Pronunciation: /ˈmilfoil/

Definition of milfoil in English:


1The common Eurasian yarrow.
Example sentences
  • Then, gardens in England were enriched with many species not previously known, among them plants which soon became very popular, like several campanulas, carnations, and milfoils.
2 (also water milfoil) A widely distributed and highly invasive aquatic plant with whorls of fine submerged leaves and wind-pollinated flowers.
  • Genus Myriophyllum, family Haloragaceae
Example sentences
  • Lakes and ponds have buttonbush, pickerel weed, bulltongue arrowhead, horned bladderwort, water milfoil, and water-shield growing in the water.
  • The common kinds include the large family of pondweeds, coontail, water milfoil, water weeds, and naiads (Najas).
  • In half of the sites studied, algae, mosses and plants such as water milfoil that had previously been absent were becoming abundant.


Middle English: via Old French from Latin millefolium, from mille 'thousand' + folium 'leaf'.

Definition of milfoil in:
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