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false rib

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noun Anatomy.
  1. any of the lower five ribs on either side of the body, which are not directly attached to the sternum.
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Origin of false rib

First recorded in 1490–1500
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

false rib in Medicine

false rib

n.
  1. Any of the five pairs of lower ribs that do not articulate directly with the sternum.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.