encyclical
noun [ C ] religion specialized uk/enˈsɪk.lɪ.kəl/ us/enˈsɪk.lɪ.kəl/
教皇通谕
a letter from the Pope to Roman Catholic bishops, often about the Church's official opinion on a subject
Several popes wrote encyclicals on the rosary. 好几位教皇都写下过关于玫瑰经念珠的通谕。