Comprehensive reference books or sets containing articles on a wide range of subjects, arranged alphabetically or by topic.
From Greek 'en- kyklos paideia' literally meaning 'general education' or 'education in a circle.' Popularized in the 18th century as a way to organize all human knowledge.
Before Wikipedia, families would save for years to buy encyclopedia sets like Britannica as status symbols—owning knowledge was literally owning a physical collection of books!
Complete word intelligence in one call. Free tier — 50 lookups/day.