coul·ter or col·ter 
(kōltər)
(kōltər)n.
A blade or wheel attached to the beam of a plow that makes vertical cuts in the soil in advance of the plowshare.
[Middle English culter, from Old English culter and Old French coltre, both from Latin culter, knife, plowshare; see skel-1 in the Appendix of Indo-European roots.]
coulterround coulter blade (left) in front of a moldboard
- Indo-European root: reuə-
- Indo-European root: rē-
- Indo-European root: rēd-
- Indo-European root: r̥tko-
- Indo-European root: sak-
- Indo-European root: sal-
- Indo-European root: sed-
- Indo-European root: segh-
- Indo-European root: sek-
- Indo-European root: sekw-
- Indo-European root: sekw-
- Indo-European root: sekw-
- Indo-European root: sel-
- Indo-European root: sem-
- Indo-European root: sem-
- Indo-European root: sen-
- Indo-European root: sengwh-
- Indo-European root: sent-
- Indo-European root: sep-
- Indo-European root: septm̥
- Indo-European root: ser-
- Indo-European root: ser-
- Indo-European root: seuə-
- Indo-European root: seuə-
- Indo-European root: skand-