1) The iron blade on a plough which makes a vertical cut into the soil and is fixed in front of the share.
1485 j sokke et j culter viijd, Clotherholme
1543 all the teames, yockes, waynes, culters, shares, Normanton
1595 all my husbandrie geare except one Coulter which I did promise him at the daie of his marriage, Austonley
1669 did see John Bucke come with a Coulter in his hands and give itt to William Knapton to breake open the stockes, Barwick in Elmet.