mac·ro·ceph·a·lus I. \ˌ ̷ ̷ ̷ ̷ˈsefələs\ Etymology: New Latin, from Greek makrokephalos having a long head synonym of phacochoerus II. noun (pluralmacrocepha·li \-ˌlī\) Etymology: New Latin, from Greek makrokephalos having a long head : a macrocephalous person or skull