encyclopaedia means in slang: An alphabetical list of articles in a book, or series of books that contains many articles. These articles can be related to the entire body of knowledge of humanity or a specific part. A reference book that provides comprehensive information about all areas or specific knowledge. (in Slang Dictionary, added by Ariana Contreras)

What else does encyclopaedia mean?

This is just a fancy way of writing Encyclopedia. (in Slang Dictionary, added by Brooklyn Cantrell)