: the dioxide of silicon SiO2 occurring in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively)
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Composite Resin Fillings Composite resin fillings that are designed to resemble the color of your teeth consist of a synthetic resin base and powdered quartz, silica, or glass.
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Anna Giorgi, Verywell Health, 10 Jan. 2025
Devaraj speculates the silica in such materials may have similarly sparked formation of early membranes.
—Bymitch Leslie, science.org, 30 Oct. 2024
Researchers estimated that 100,000 workers in the U.S. are potentially at risk of silicosis due to exposure to silica dust.
—Vanessa Etienne, People.com, 3 Dec. 2024
The scientists started by creating a soil-substitute growth media made up of silica nanoparticles, hydroxypropyl methyl cellulose resin, and water.
—Ben Coxworth, New Atlas, 24 Nov. 2024
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Anna Giorgi, Verywell Health, 10 Jan. 2025
Devaraj speculates the silica in such materials may have similarly sparked formation of early membranes.
—Bymitch Leslie, science.org, 30 Oct. 2024
Researchers estimated that 100,000 workers in the U.S. are potentially at risk of silicosis due to exposure to silica dust.
—Vanessa Etienne, People.com, 3 Dec. 2024
The scientists started by creating a soil-substitute growth media made up of silica nanoparticles, hydroxypropyl methyl cellulose resin, and water.
—Ben Coxworth, New Atlas, 24 Nov. 2024
See all Example Sentences for silica
Dictionary Entries Near silica
Cite this Entry
“Silica.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/silica. Accessed 18 Jan. 2025.
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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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