SYN: posteromedial.
* * *
pos·tero·in·ter·nal .päs-tə-rō-in-'tərn-əl adj posterior and internal in position or direction <a \posterointernal cusp on a molar>
* * *
pos·tero·in·ter·nal (pos″tər-o-in-turґnəl) situated within and toward the posterior surface.Medical dictionary. 2011.