echelon

باللغة العربية: مُسْتَوًى، طَبَقَة، تَشْكِيل مُدَرَّج

1. A level or rank in an organization, profession, or society.
2. A line of riders seeking maximum drafting in a crosswind, resulting in a diagonal line across the road.
3. A formation of troops, ships, aircraft, etc., in diagonal parallel rows.

الجمع echelons