oxgang

Short definition from Wiktionary

Noun

1. 1
   The area of land that could be plowed by an ox in a year, ¹⁄₈ hide or carucate and notionally 15 acres.
2. 2
   The similar Scottish concept, ¹⁄₈ of a ploughgate and notionally 12+¹⁄₂ or 13 Scottish acres.