- Relating to the ribs and the sternum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for costosternal
From the ventral trunk of the thoracic artery a variable number of small vessels arises to supply the costosternal articulations.Thoracic and Coracoid Arteries In Two Families of Birds, Columbidae and Hirundinidae
Marion Anne Jenkinson