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Noun: coulter  kówl-tu(r)
  1. A sharp steel wedge that precedes the plough and cuts vertically through the soil
    "The coulter sliced through the earth, preparing it for ploughing";
    - colter [US]

Derived forms: coulters

Type of: wedge

Part of: moldboard plow [N. Amer], mouldboard plough [Brit, Cdn]

Encyclopedia: Coulter, Robert