echelon

echelon
echelonment, n.
/esh"euh lon'/, n.
1. a level of command, authority, or rank: the top echelon of city officials.
2. a formation of troops, ships, airplanes, etc., in which groups of soldiers or individual vehicles or craft are arranged in parallel lines, each to the right or left of the one in front, so that the whole presents the appearance of steps.
3. one of the groups of a formation so arranged.
4. Also called echelon grating. Spectroscopy. a diffraction grating that is used in the resolution of fine structure lines and consists of a series of plates of equal thickness stacked in staircase fashion.
v.t., v.i.
5. to form in an echelon.
[1790-1800; < F échelon, orig. rung of a ladder, OF eschelon, equiv. to esch(i)ele ladder ( < L scala; see SCALE3) + -on n. suffix]
Syn. 1. grade, position, rating.

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Universalium. 2010.

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  • echelon — [esh′ə län΄] n. [Fr échelon, ladder rung < échelle < OFr eschelle < L scala, ladder: see SCALE1] 1. a) a steplike formation of ships or troops, in which each unit is slightly to the left or right of the one preceding it b) a similar… …   English World dictionary

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  • Echelon — Ech e*lon ([e^]sh e*l[o^]n), n. [F., fr. [ e]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 …   The Collaborative International Dictionary of English

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  • Echelon — Ech e*lon, v. i. To take position in echelon. [1913 Webster] Change direction to the left, echelon by battalion from the right. Upton (Tactics). [1913 Webster] …   The Collaborative International Dictionary of English

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