i Register
In some senses, cyclopaedia is marked as archaic. Watch for register when choosing this word.
cyclopaedia
UK /saɪk.ləʊˈpiːd.i.ə/ US /saɪk.ləʊˈpiːd.i.ə/
noun 2
Definitions
noun
1
The circle or compass of the arts and sciences (originally, of the seven so-called liberal arts and sciences); circle of human knowledge.
2
An encyclopedia.
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