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Noun: colter  kówl-tur
Usage: US (elsewhere: coulter)
  1. A sharp steel wedge that precedes the plow and cuts vertically through the soil
    "The colter sliced through the earth, preparing it for plowing";
    - coulter

Derived forms: colters

Type of: wedge

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

Encyclopedia: Colter, Richard