1) Bone 2) Breastbone-related 3) Chest related 4) Near the breastbone 5) Of the breastbone 6) Of the sternum 7) Related to the chest Found on https://www.crosswordclues.com/clue/sternal
Ster'nal adjective (Anat.) Of or pertaining to the sternum; in the region of the sternum. Sternal ribs . See the Note under Rib , noun , 1. Found on http://www.encyclo.co.uk/webster/S/195