silica [i s7likq ]     (순위: 12547 - 대졸 수준)   뜻  명) [화학] 규토, 무수규산, 이산화규소 Mean  A white or colorless crystalline compound, SiO2, occurring abundantly as quartz, sand, flint, agate, and many other minerals and used to manufacture a wide variety of materials, especially glass and concrete.