DICT.TW Dictionary Taiwan

 coul·ter /ˈkoltɚ/
 犁刀

 Col·ter n.  A knife or cutter, attached to the beam of a plow to cut the sward, in advance of the plowshare and moldboard. [Written also coulter.]
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 Coul·ter n. Same as Colter.
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 coulter
      n : a sharp steel wedge that precedes the plow and cuts
          vertically through the soil [syn: colter]

 Coulter
    (1 Sam. 13:20, 21), an agricultural instrument, elsewhere called
    "ploughshare" (Isa. 2:4; Micah 4:3; Joel 3:10). It was the
    facing-piece of a plough, analogous to the modern coulter.