: the dioxide of silicon SiO2 occurring in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively)
Examples of silica in a Sentence
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Which is why Mack recommends products that have baking soda, calcium carbonate, or hydrated silica for a holistic alternative.
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Essence, 8 May 2024
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Walkers Quarry once supplied the silica sand used in nearly all of Barbados’ construction projects.
—Sara Miller Llana, The Christian Science Monitor, 22 Apr. 2024
See all Example Sentences for silica 
Essence, 8 May 2024
Recommended Balance Beyond TikTok ban: How one state is grappling with teens and scrolling
Walkers Quarry once supplied the silica sand used in nearly all of Barbados’ construction projects.
—Sara Miller Llana, The Christian Science Monitor, 22 Apr. 2024
See all Example Sentences for silica
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“Silica.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/silica. Accessed 31 May. 2024.
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silica
noun
sil·i·ca
ˈsil-i-kə 
: a compound that consists of the dioxide of silicon and occurs in various forms (as in quartz, opal, and sand)
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