The Collaborative International Dictionary of English v.0.48:
Sternal \Ster"nal\, a. (Anat.) Of or pertaining to the sternum; in the region of the sternum. [1913 Webster] Sternal ribs. See the Note under Rib, n., 1. [1913 Webster]WordNet (r) 3.0 (2006):
sternal adj 1: of or relating to or near the sternum