
An orillon, also known as an orillion, is an architectural element of a military fortification. The ear-shaped projection of masonry provided defense for guns and soldiers at the flank of a bastion. However, an orillon could also shield a city gate. An orillon (link below), sometimes referred to as an orillion, is an architectural element of a for...
Found on
http://en.wikipedia.org/wiki/Orillon

• (n.) A semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, -- found in old fortresses.
Found on
http://thinkexist.com/dictionary/meaning/orillon/
O·ril'lon noun [ French, lit., a little ear, from
oreille an ear, from Latin
oricula ,
auricula , dim. of
auris an ear. See
Ear .]
(Fort.) A semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, -- found in o...
Found on
http://www.encyclo.co.uk/webster/O/32

In fortifications an orillon was a semi-circular projection made at the shoulder of a bastion for the purpose of covering the retired flank.
Found on
http://www.probertencyclopaedia.com/browse/FO.HTM
No exact match found.