二に酸さん化かケイ素そにさんかけいそMeanings1nounsilicon dioxide; silicachemistryChemical term for SiO₂; used in scientific and industrial contexts. Also referred to as シリカ.See also: シリカ二に酸さん化かケイ素そはガラスの主しゅ成せい分ぶんです。Silicon dioxide is the main component of glass.