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Definition of Champollion
1. Noun. Frenchman and Egyptologist who studied the Rosetta Stone and in 1821 became the first person to decipher Egyptian hieroglyphics (1790-1832). 
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1. Noun. Frenchman and Egyptologist who studied the Rosetta Stone and in 1821 became the first person to decipher Egyptian hieroglyphics (1790-1832).