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The Onomasticon was a Greek thesaurus compiled by Julius Pollux, a scholar and rhetorician who lived in the 2nd century AD. This ten-volume work, which has not survived in its entirety, served as a collection of terms and rhetorical material. It covered a wide array of subjects, including music, theatre, law, and the vocabulary used in legal proceedings. The Onomasticon also contained citations from literature and is considered a valuable source for understanding ancient Greek vocabulary and rhetoric. The term "onomasticon" itself refers to a collection or listing of words, particularly in a specialized field, or a work containing such a listing.12

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