An encyclopedia is a book or set of books in which facts about many different subjects or about one particular subject are arranged for reference. 百科全书
noun [专属名词]百科全书,(某一学科的)专科全书(=encyclopaedia)
The encyclopedia is available on CD-ROM. 百科全书光盘已上市。
en + cyclo(环, 圆) + ped(儿童) + ia → 教给儿童全面知识的书 → 百科全书