
1) Ridge of land
Found on
https://www.crosswordclues.com/clue/selion

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 simil...
Found on
http://en.wikipedia.org/wiki/Selion

• (n.) A short piece of land in arable ridges and furrows, of uncertain quantity; also, a ridge of land lying between two furrows.
Found on
http://thinkexist.com/dictionary/meaning/selion/
Sel'ion noun [ Old French
seillon a measure of land, French
sillon a ridge, furrow, Late Latin
selio a measure of land.] A short piece of land in arable ridges and furrows, of uncertain quantity; also, a ridge of land lying between two furrows. [ Obsolete or Prov. Eng.]
Found on
http://www.encyclo.co.uk/webster/S/61
No exact match found.