coulter
A cutter, consisting of a blade in either knife form or disk form, attached to the ploughbeam of a plough to cut the sward, in front of the ploughshare and mouldboard.
Holonyms: plough, plow < implement
The part of a seed drill that makes the furrow for the seed.
Where it comes from
Inherited from Middle English culter, from Old English culter, from Latin culter (“a knife”). For the phonetic development, see poultry.
Adapted from the Wiktionary entry coulter (CC BY-SA 4.0).