IPA: //sɪkˈloʊpiːdiə//
KK: /sɪkloʊˈpiːdiə/
A book or set of books that contains information on many different subjects, usually arranged in alphabetical order.
I found a lot of useful information in the cyclopedia for my research project.
Cyclopedia → It is formed from "cyclus" (from Greek "kyklos", meaning circle) and "paedia" (from Greek "paideia", meaning education or rearing). The word refers to a comprehensive work that circles around various subjects of knowledge, providing education on many topics.
Think of a 'circle' ('cyclus') of knowledge that provides 'education' ('paedia') on many subjects — that's what a cyclopedia is.