orillonEtymologyFrom French orillon (literally “little ear”), from oreille (“an ear”), from Latin oricula, auricula, diminutive of auris (“an ear”). See ear.orillon means A semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, found in old fortresses. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounA semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, found in old fortresses.