Encyclopedia

An (alternatively encyclopaedia/encyclopædia) is a written compendium of knowledge. The term comes from the Greek {{polytonic|????????? ???????}} (engkuklios paideia), literally "a rounded education". Many encyclopedias are titled Cyclopaedia and the terms are interchangeable.

Reference

• Robert Collison, Encyclopaedias: Their History Throughout the Ages, 2nd ed. (New York, London: Hafner 1966)