encyclopedia

/ənˌsəɪ.kləˈpi.di.ə/noun

A wide-ranging reference work covering many areas of knowledge, produced in any format, not only as a set of books.

Example sentence

“As a kid, I spent hours browsing the online encyclopedia for random facts.”

A 'walking encyclopedia' is a person who seems to know everything. British spelling sometimes keeps the extra vowel: 'encyclopaedia'.

Related words

workbookA study book with questions and exercises, giving students space to write their answers and working.dictionaryA reference book covering one subject or field, with its entries listed in alphabetical order like an A-to-Z encyclopedia.stationeryPaper, envelopes, pens, and other supplies used for writing and office work.atlasA book of maps, often including charts, pictures, or explanatory text.pencilA writing tool with a thin graphite core, usually encased in wood and sharpened to a point.globeThe world we live on; the planet Earth.