Definition of "onomasticon" []

• A book, list, or vocabulary of names, especially of people. (noun)

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• "My only fear is that the book will be culled, since no one ever uses an onomasticon, but I think Wallingford keeps it because it looks expensive and obscure enough to reassure visiting parents that their kids are learning genius-type stuff."
• "My working money—a total of three thousand dollars—is hidden between the pages of a big leather-bound onomasticon."
• "Meanwhile, if the thesaursus doll had legal definitions printed on it, I believe it would instead be an “onomasticon”."