/thawr"ee euh, thohr"-/, n. Chem.
a white, heavy, water-insoluble powder, ThO2, used chiefly in incandescent mantles, as the Welsbach gas mantle. Also called thorium oxide, thorium dioxide.
[1835-45; THORI(UM) + -A4]

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Universalium. 2010.

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  • Thoria — Tho ri*a, n. [NL. See {Thorite}.] (Chem.) A rare white earthy substance, consisting of the oxide of thorium; formerly called also {thorina}. [1913 Webster] …   The Collaborative International Dictionary of English

  • thoria — [thôr′ē ə] n. [ModL < Swed Thorjord, lit., Thor earth (so named by BERZELIUS Baron Jöns Jakob): see THORIUM] a white, powdery form of thorium dioxide, ThO2, used esp. in gas mantles and in making refractory crucibles …   English World dictionary

  • Thorĭa lex — Thorĭa lex, s.u. Agrariae leges e) …   Pierer's Universal-Lexikon

  • THORIA Lex — vide Thorius …   Hofmann J. Lexicon universale

  • thoria — noun Etymology: New Latin, from thorium + a Date: circa 1841 a powdery white oxide of thorium ThO2 used especially as a catalyst and in crucibles and refractories and optical glass …   New Collegiate Dictionary

  • thoria — [ θɔ:rɪə] noun Chemistry thorium dioxide, a white refractory solid used in making gas mantles and other materials for high temperature applications. Origin C19: from thorium …   English new terms dictionary

  • thoria — tho·ria …   English syllables

  • thoria — tho•ri•a [[t]ˈθɔr i ə, ˈθoʊr [/t]] n. chem. thorium dioxide, a white, heavy, water insoluble powder, ThO2, used chiefly in incandescent mantles • Etymology: 1835–45; thori (um) + a III …   From formal English to slang

  • thoria — /ˈθɔriə/ (say thawreeuh) noun an oxide of thorium, ThO2, a white powder, used in making gas mantles. {thori(um) + a; modelled on magnesia} …  

  • thoria — n. the oxide of thorium …   Useful english dictionary

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