om·pha·los \ˈäm(p)fəˌläs, -_ləs\noun (pluralompha·li \-ˌlī, -ˌlē\) Etymology: Greek, literally, navel 1.: a central part : focal point < come to a sort of omphalos of the whole projected history — George Saintsbury > 2.alsoom·pha·lus\-_ləs\[New Latin, from Greek omphalos]: umbilicus