soam
nounEtymology Uncertain. Perhaps from a variant of seam.
1
A chain by which a leading horse draws a plough.
- In this mode of yoking, the horses work in unicorn-team, the middle horse pulling by the soam- chain, instead of the swingtree1858, James Slight, Robert Scott Burn, The Book of Farm Implements and Machines:
3
A horse-lead.