oxgang
The area of land that could be plowed by an ox in a year, ¹⁄₈ hide or carucate and notionally 15 acres.
historical
1418. John, son and heir of Henry de Rishworth, herioted a cottage and a royd in the Hey in Hipperholme.
1417. Henry Rishworth formerly held two oxgangs in Hipperholme, Osbarn rode, lands in Coley, etc. His nephew Henry, son of Nicholas de Rishworth, next heir, paid 10s heriot.The similar Scottish concept, ¹⁄₈ of a ploughgate and notionally 12+¹⁄₂ or 13 Scottish acres.
historical
Where it comes from
From Middle English oxegang, from Old English oxangang (“¹⁄₈ hide or ploughland”), equivalent to ox + gang.
Adapted from the Wiktionary entry oxgang (CC BY-SA 4.0).