Noun
The bone of the breast; the sternum.
Source: Webster's dictionaryCarinatae is the group of all birds and their extinct relatives to possess a keel, or "carina", on the underside of the breastbone used to anchor large flight muscles. Source: Internet
At the front of the chest, the breast tissue can extend from the clavicle (collarbone) to the middle of the sternum (breastbone). Source: Internet
Angina feels like a pressing or squeezing pain, usually in your chest under the breastbone. Source: Internet
McKinley was hit in the breastbone and stomach, and died eight days later. Source: Internet
The chest ( thoracic cavity ) progressively slopes outwards from the thoracic inlet (atop the breastbone ) and above to the lowest ribs that support the breasts. Source: Internet
Beneath his open shirt, the youth’s chest lacks any trace of modeling: no shadow, no sign of ribs, or muscle, or breastbone, nothing but a wash of pale flesh-colored pigment. Source: Internet