midsternum

bod·y of ster·num

[TA] the middle and largest portion of the sternum, lying between the manubrium superiorly and the xiphoid process inferiorly. Synonym(s): corpus sterni [TA], gladiolus, mesosternum, midsternum

midsternum

(mĭd-stĕr′nŭm) The largest and middle portion of the sternum.