Orillon \O*ril"lon\, n. [F., lit., a little ear, from oreille an
ear, fr. L. 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
old fortresses.
[1913 Webster]