Also found in: Acronyms, Idioms, Encyclopedia, Wikipedia.
An extensive, hard desert surface consisting of wind-polished gravel lying on alluvial soil and cemented together by mineralized solutions.
[Maghrebi dialectal Arabic, from Arabic riqq, ruqq, from raqqa, to be thin, fine; see rqq in Semitic roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
[< Latin rēgīna]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.