Webster's Revised Unabridged Dictionary
F., lit., a little ear, from oreille, an ear, fr. L. oricula, auricula, dim. of auris, an ear. See Ear
Chambers's Twentieth Century Dictionary
Fr.,—oreille, an ear—L. auricula, dim. of auris, ear.
Now, Harlequins are very popular in Rue de l'Orillon.
"Monsieur Cherami" by Charles Paul de Kock
It may be observed that he sometimes uses the straight flank, and sometimes the curved flank with orillon.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6" by Various