An encyclical is a special message written by the Pope and addresses moral or doctrinal issues. The encyclical was sent to every diocese to outline the new church policies.
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Global Relevance
Although coming from the Catholic Pope, encyclicals may have messages on universal issues, like peace or climate. The encyclical on climate change urged all people to act responsibly towards the environment.
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Not a Common Word
The term 'encyclical' is not commonly used in everyday conversation; it's specific to religious documents. Outside the church meeting, you'd rarely hear the term 'encyclical'.