Echelon

Part of speech: noun (n.)

1. 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. An arrangement of a fleet in a wedge or Encyc. Dict. Echelon lens (Optics), a large lens constructed in several parts or layers, extending in a succession of annular rings beyond the central lens; - - used in lighthouses.

Part of speech: verb (v.)

To place in echelon; to station divisions of troops in echelon.

Part of speech: verb (v.)

To take position in echelon. Change direction to the left, echelon by battalion from the right. Upton (Tactics).