of or relating to the sternum.
Origin of sternal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for substernal
Historical Examples of substernal
Substernal, sub-ster′nal, adj. situated beneath the sternum.
Of, relating to, or occurring near the sternum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.