A unit of measurement relating to area.I have only ever heard it used as a square measure....
Existing Farming square measure is 1961.05 hectares; rice farming square measure is 1324.13 hectares.
A square measure equal, in England and Scotland, usually to one fourth of an acre, or 40 square rods; in the Union of South Africa, to 17.07 square yards, or 14.28 square meters. 2