Dumont d’Urville [dy-mawn dyr-veel] noun Jules Sé·bas·tien Cé·sar [zhyl sey-bas-tyan sey-zar] /ʒül seɪ basˈtyɛ̃ seɪˈzar/, 1790–1842, French naval officer: explored South Pacific and Antarctic. Liberaldictionary.com
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