silicon dioxide silicon copper • silicone · · · Info · Definitions · Synonyms · Characters · · silicon dioxide · · Text Common · · Latin · · Scripts 15 · · Length 5 · · Syllables Definitions · · · (noun) 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. Synonyms: silica, silicon oxide, silicon dioxide. · · Noun Definition 1 Synonyms · · · silica · · Synonym 1 silicon oxide · · Synonym 2 Characters · · space U+0020 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 x latin small letter x U+0078