noun Etymology: New Latin, from Latin silic-, silex hard stone, flint Date: circa 1801 silicon dioxide SiO 2 occurring in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively)
SILICA
Meaning of SILICA in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012