Ech"e*lon (?), n. [F., fr. 'echelle 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 form.
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.
© Webster 1913.
Ech"e*lon (?), v. t. Mil.
To place in echelon; to station divisions of troops in echelon.
© Webster 1913.
Ech"e*lon, v. i.
To take position in echelon.
Change direction to the left, echelon by battalion from the right.
Upton (Tactics).
© Webster 1913.