silica

noun
sil·​i·​ca | \ ˈsi-li-kə How to pronounce silica (audio) \

Definition of silica

: 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

Recent Examples on the Web Higher intakes of silica, a mineral found in quartz, is linked to higher bone density. Christy Brissette, chicagotribune.com, "There’s no solid evidence alkaline water is better for you," 29 Aug. 2019 Higher intakes of silica, a mineral found in quartz, is linked to higher bone density. Christy Brissette, Washington Post, "Is alkaline water really better for you?," 28 Aug. 2019 Researchers have postulated that bone health effects of certain types of water could be due to higher calcium content or the presence of silica in some alkaline water. Christy Brissette, chicagotribune.com, "There’s no solid evidence alkaline water is better for you," 29 Aug. 2019 The dominant type of cement out there is called Portland cement, which is formed by combining calcium oxide with silica in a kiln at an even higher temperature. Scott K. Johnson, Ars Technica, "Splitting water to make cement could clean up a dirty industry," 17 Sep. 2019 Researchers have postulated that bone health effects of certain types of water could be due to higher calcium content or the presence of silica in some alkaline water. Christy Brissette, chicagotribune.com, "There’s no solid evidence alkaline water is better for you," 29 Aug. 2019 Researchers have postulated that bone health effects of certain types of water could be due to higher calcium content or the presence of silica in some alkaline water. Christy Brissette, Washington Post, "Is alkaline water really better for you?," 28 Aug. 2019 Sand mining can also pose a human health risk in the form of silicosis, a lung disease caused by inhaling tiny, airborne silica particles. Geoffrey Giller, Discover Magazine, "The Midwestern Sand Mines Feeding the Fracking Industry," 26 Apr. 2019 The problem: The science concerning silica is confusing, to say the least. Olivia Fleming & Jenna Rosenstein, Harper's BAZAAR, "The Ultimate Guide to Clean Beauty," 12 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'silica.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of silica

circa 1801, in the meaning defined above

History and Etymology for silica

New Latin, from Latin silic-, silex hard stone, flint

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Statistics for silica

Last Updated

6 Nov 2019

Time Traveler for silica

The first known use of silica was circa 1801

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More Definitions for silica

silica

noun
How to pronounce silica (audio)

English Language Learners Definition of silica

: a chemical that contains silicon, that is found in sand and quartz, and that is used to make glass

silica

noun
sil·​i·​ca | \ ˈsil-i-kə How to pronounce silica (audio) \

Medical Definition of silica

: the dioxide of silicon SiO2 that is used as an ingredient of simethicone and that occurs naturally in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively)

called also silicon dioxide

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More from Merriam-Webster on silica

Spanish Central: Translation of silica

Nglish: Translation of silica for Spanish Speakers

Britannica.com: Encyclopedia article about silica

Comments on silica

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