Selion is a
medieval open strip of land or small
field used for growing
crops, usually owned by or rented to
peasants. A selion of land was typically one
furlong (660 ft) long and one chain (66 ft) wide. However, exact measurements could vary depending on geography of the land. The area of one furlong by one chain is one
acre.
Monasteries or similar institutions were often bequeathed selions and then derived an
income from them by letting.