QUARTZ-DIORITE Meaning of QUARTZ-DIORITE in English ˈ ̷ ̷ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun : diorite containing appreciable amounts of quartz Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012