transubstantiation
noun [ U ] religion specialized uk/ˌtræn.səbˌstæn.ʃiˈeɪ.ʃən/ us/ˌtræn.səbˌstæn.ʃiˈeɪ.ʃən/
（尤指天主教的）变体论（指圣餐中的面包和葡萄酒在弥撒中变成了耶稣的身体和血液）
the belief, especially by Roman Catholics, that during Mass (= a religious ceremony) bread and wine are changed into the body and blood of Jesus Christ