any of the lower five ribs on either side of the body, which are not directly attached to the sternum.
Origin of false rib
First recorded in 1490–1500
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Any of the five pairs of lower ribs that do not articulate directly with the sternum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.