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Related to false rib: Sternal ribs
Any of the lower ribs that do not unite directly with the sternum. The five lower pairs of ribs in humans are false ribs.
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.
any of the lower five ribs on either side of the body, which are not directly attached to the sternum.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.