석영이나 모래의 주성분이며 유리 제조 등에 쓰이는 단단하고 반응성이 낮은 이산화 규소 화합물.
A hard, unreactive, colorless compound occurring as the mineral quartz and as a principal constituent of sandstone and other rocks.
예문:
"Silica is the most abundant compound in the Earth's crust."
"The production of high-quality glass requires pure silica sand."
"Silica gel packets are often included in packaging to absorb moisture."