sanctum sanctorum
Pronunciation: /saŋ(k)ˈtɔːrəm/
Definition of sanctum sanctorum
noun ( plural sancta sanctorum or sanctum sanctorums)
Origin:
late Middle English: Latin sanctum (see sanctum) + sanctorum 'of holy places', translating Hebrew qōḏeš haqqŏḏāšīm 'holy of holies'