Covering many subjects comprehensively; having the broad, detailed, and organized scope of an encyclopedia.
American English spelling from encyclopedia (Greek enkyklios paideia, 'complete circular education') + -ic suffix. Standardized by Noah Webster's 1828 dictionary, dropping the 'a' from British encyclopaedia.
Having 'encyclopedic knowledge' is actually rarer now than in the 1800s—the internet has exploded into such specialized domains that nobody can truly be encyclopedic anymore.
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