ORILLON

orillon. Orillon, n. a rounding of earth on the shoulder of bastions that have casemates

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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.