echelon , n :
A level or rank in an organization, profession, or society. (cycling) A line of riders seeking maximum drafting in a crosswind, resulting in a diagonal line across the road. (military) A formation of troops, ships, etc., in diagonal parallel rows.
Source http://handbookblogger.blogspot.com/2018/02/echelon-word-of-day-for-february-10-2018.html
