IPA: /ɪnˌsaɪkləˈpoʊdiə/
KK: /ɪnˌsaɪkləˈpoʊdiə/
A book or set of books that provides detailed information on many subjects, usually organized in alphabetical order.
I found the answer to my question in the encyclopedia.
Encyclopedia → It is formed from "en-" (meaning in or within), "kyklos" (meaning circle), and "paideia" (meaning education or upbringing). The word combines to describe a comprehensive work that encompasses all areas of knowledge, as if encircling the entirety of education.
Think of a book that contains knowledge 'within' ('en-') a 'circle' ('kyklos') of learning, which helps you remember that an encyclopedia is a collection of all kinds of information.