Umchazabukhulu (kusuka ku-Ancient Greek; geo- "umhlaba", -metron "isilinganiso"), nge- arithmetic, ungelinye lamagatsha amadala omchazazibalo . Uphathelene nezici zendawo ezihlobene nebanga, ukuma, ubukhulu, kanye nokuma okulinganiselwe kwezibalo. uSoZibalo osebenza emkhakheni womchazabukhulu ubizwa ngokuthi uSoBukhulu.