coulter

n. 犁刀

coul.ter

n.（名词）
A blade or wheel attached to the beam of a plow that makes vertical cuts in the soil in advance of the plowshare.
犁刀：附在犁辕上的刀或圆轮，用来纵切犁的铧头前的土地

来源：
Middle English culter
中古英语 culter
from Old English culter
源自 古英语 culter
Old French coltre
古法语 coltre
both from Latin culter [knife, plowshare] * see skel-
都源自 拉丁语 culter [刀，犁头] *参见 skel-