: 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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The new rule was set to take effect in April, cutting the allowable level of silica dust in the air inside mines by half — to the limit already in place for other industries — and set stricter guidelines for enforcement.
—
Taylor Sisk, CNN Money, 26 May 2025
According to the study, SNAP-X is packed with ultra-tiny silica capsules, each smaller than 70 nanometers (for comparison, the average human hair is 80,000-100,000 nanometers wide).
—Jenny Lehmann, Discover Magazine, 16 May 2025
By encapsulating the chemical compounds from the algae in silica nanoparticles and then suspending them in a liquid gel that would later solidify when exposed to ultraviolet light, the scientists created SNAP-X, which can cure in place and deliver extended chemical signals.
—City News Service, San Diego Union-Tribune, 14 May 2025
The silica will help absorb excess moisture and give you the best change of recovery.
—Mary Catherine McAnnally Scott, Southern Living, 27 Apr. 2025
See All Example Sentences for silica
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Taylor Sisk, CNN Money, 26 May 2025
According to the study, SNAP-X is packed with ultra-tiny silica capsules, each smaller than 70 nanometers (for comparison, the average human hair is 80,000-100,000 nanometers wide).
—Jenny Lehmann, Discover Magazine, 16 May 2025
By encapsulating the chemical compounds from the algae in silica nanoparticles and then suspending them in a liquid gel that would later solidify when exposed to ultraviolet light, the scientists created SNAP-X, which can cure in place and deliver extended chemical signals.
—City News Service, San Diego Union-Tribune, 14 May 2025
The silica will help absorb excess moisture and give you the best change of recovery.
—Mary Catherine McAnnally Scott, Southern Living, 27 Apr. 2025
See All Example Sentences for silica
Cite this Entry
“Silica.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/silica. Accessed 3 Jun. 2025.
Copy CitationKids Definition
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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