‖ mesosternebraAnat.|mɛsəʊˈstɜːnɪbrə| Also anglicized -sterneber. [mod.L., f.Gr. µέσο-ς middle + sternebra: see sternebra.] Any of the sternebræ which intervene between the manubrium of the sternum and the ensiform appendage. Hence mesoˈsternebrala. In recent Dicts.