sulphide ores

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• matte — matte1 [mat] noun an impure product of the smelting of sulphide ores, especially those of copper or nickel. Origin C19: from Fr. (in OFr. meaning curds ), feminine of mat matt . matte2 [mat] noun a mask used to obscure part of an image in a film… …   English new terms dictionary

• matte — I. /mæt/ (say mat) noun an unfinished metallic product of the smelting of certain sulphide ores, especially those of copper. {French. See matt} II. /mæt/ (say mat) adjective, noun, verb (t) US → …  

• germanium — n. Chem. a lustrous brittle semi metallic element occurring naturally in sulphide ores and used in semiconductors. Usage: Symb.: Ge. Etymology: mod.L f. Germanus GERMAN …   Useful english dictionary

• matte — 1. n. an impure product of the smelting of sulphide ores, esp. those of copper or nickel. Etymology: F 2. n. Cinematog. a mask to obscure part of an image and allow another image to be superimposed, giving a combined effect. Etymology: F …   Useful english dictionary

• selenium — n. Chem. a non metallic element occurring naturally in various metallic sulphide ores and characterized by the variation of its electrical resistivity with intensity of illumination. Usage: Symb.: Se. Phrases and idioms: selenium cell a piece of… …   Useful english dictionary

• thiobacillus — noun small rod shaped bacteria living in sewage or soil and oxidizing sulfur • Hypernyms: ↑eubacteria, ↑eubacterium, ↑true bacteria • Hyponyms: ↑thiobacteria, ↑sulphur bacteria, ↑sulfur bacteria …   Useful english dictionary