We found one dictionary that defines the word encyclical letters:

General (1 matching dictionary)

1. encyclical letters: Vocabulary.com

(Note: See encyclical_letter as well.)

Definitions from Wiktionary (encyclical letter) ▸ noun:  Synonym of encyclical ▸ Also see encyclical_letter ▸ Words similar to encyclical letters ▸ Usage examples for encyclical letters ▸ Idioms related to encyclical letters ▸ Wikipedia articles (New!) ▸ Words that often appear near encyclical letters ▸ Rhymes of encyclical letters ▸ Invented words related to encyclical letters