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(sh"eln), n.[F., fr. chelle ladder, fr. L. scala.] 1. (Mil.) An arrangement of a body of troops when its divisions are drawn up in parallel lines each to the right or the left of the one in advance of it, like the steps of a ladder in position for climbing. Also used adjectively; as, echelon distance. Upton (Tactics). 2. (Naval) An arrangement of a fleet in a wedge or V formation. Encyc. Dict. Echelon lens (Opt.), a large lens constructed in several parts or layers, extending in a succession of annular rings beyond the central lens; -- used in lighthouses. Ech"elon (), v. t.(Mil.) To place in echelon; to station divisions of troops in echelon. Ech"elon v. i.To take position in echelon. Change direction to the left, echelon by battalion from the right. Upton (Tactics). スポンサード リンク
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