Fitted on the neck of oxen for the purpose of binding to them the traces by which they might draw the plough, etc. (Numbers 19:2; Deuteronomy 21:3). It was a curved piece of wood called 'ol.
In 1 Samuel 11:7,1 Kings 19:21, Job 1:3 the word thus translated is tzemed, which signifies a pair, two oxen yoked or coupled together, and hence in 1 Samuel 14:14 it represents as much land as a yoke of oxen could plough in a day, like the Latin jugum. In Isaiah 5:10 this word in the plural is translated "acres."