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silica 音标拼音: [s'ɪləkə] [s'ɪlɪkə] n. 硅石,无水硅酸,硅土 矽石,无水矽酸,矽土 silica n 1: a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite [synonym: {silica}, {silicon oxide}, {silicon dioxide}] Silica \Sil"i*ca\, n. [NL., from L. silex, silics, a flint.]
(Chem.) Silicon dioxide, SiO?. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder. [1913 Webster]
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