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An extensive, nearly level, low desert plain from which fine sand has been removed by wind, leaving a sheet of coarse, smoothly angular, wind-polished gravel and small stones lying on an alluvial soil, strongly cemented by mineralized solutions to form a broad desert pavement. Also known as gravel desert.


Abbr. for “regular.”


1. On drawings, abbr. for register.
2. On drawings, abbr. for regulator.