An "encyclical" is a type of letter written by the Pope of the Roman Catholic Church. It is a formal, official document that discusses important religious and moral issues, intended to guide and inform Catholics around the world. Full definition
«New survey on Americans» views on papal encyclical on climate change: Catholics mirror non-Catholic Americans in key attitudes about global warming.» (sciencedaily.com)
In the course of the development of the Church's teaching, we have at present the most comprehensive understanding of the free, just, and democratic society set forth in encyclicals such as Centesimus Annus and Evangelium Vitae. (firstthings.com)
It's clear that the first papal encyclical on climate change is receiving massive attention. (christianitytoday.com)