IIInumeralformal/ˈtɾeʃ/lowPortuguesEnglishEspanolFrancaisDefinitionRoman numeral representing the number three.Pope Pius III had a very short pontificate.The 3rd century AD was a period of great instability in the Roman Empire.synthree3EtymologyDo latim 'tertius' (terceiro). Representação numeral romana.Related wordsterceiroIII