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encyclopedia

mastery

UK /ɪnˌsaɪ.kləˈpi(ː).dɪə/ US /ɪnˌsaɪ.kləˈpi(ː).di.ə/noun

card 1 of 8 · synonym

Which word is closest in meaning to 'encyclopedia' in this sentence?

His life's work is a four-volume encyclopedia of aviation topics.