thorinum

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• thorinum — Thorium Tho ri*um, n. [NL. See {Thorite}.] (Chem.) A metallic element found in certain rare minerals, as thorite, pyrochlore, monazite, etc., and isolated as an infusible gray metallic powder which burns in the air and forms thoria; formerly… …   The Collaborative International Dictionary of English

• THORIUM — En 1828, Jöns Jacob Berzelius découvrit un nouveau métal qu’il baptisa thorium en l’honneur de Thor, dieu de la mythologie scandinave. Bien qu’il soit relativement rare, cet élément a été utilisé depuis longtemps dans l’industrie, principalement… …   Encyclopédie Universelle

• Thorium — Tho ri*um, n. [NL. See {Thorite}.] (Chem.) A metallic element found in certain rare minerals, as thorite, pyrochlore, monazite, etc., and isolated as an infusible gray metallic powder which burns in the air and forms thoria; formerly called also… …   The Collaborative International Dictionary of English

• thorium — noun a chemical element (symbol Th) with atomic number 90. Syn: thorinum See Also: Thor, thorite, thorotrast …   Wiktionary