Definition of silica
: the dioxide of silicon SiO2 occurring in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively)
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Recent Examples of silica from the Web
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Common sense says that putting smoke, aerosol, vehicle exhaust, asbestos, coal dust, silica or any inhaled chemicals into your lungs (deliberately or not) is going against self-preservation and a healthy body.
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Acid helps extract the mineral and separate it from silica.
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With a combination of silica dust and coal dust, miners can pick up black lung much faster than with coal dust alone.
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Acid helps extract the mineral and separate it from silica.
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The silica used incorporates cobalt chloride, which helps to retain both the shape and color of the flowers.
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Acid helps extract the mineral and separate it from silica.
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These picks feature a wide variety of whitening agents, including peroxide, silica, and charcoal, but Wolff urges people to have realistic expectations.
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The product itself has a clear, pointed pencil tip made of lauroyl lysine and silica, both common ingredients in all-over face primers.
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.
Origin and Etymology of silica
New Latin, from Latin silic-, silex hard stone, flint
SILICA Defined for English Language Learners
Definition of silica for English Language Learners
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: a chemical that contains silicon, that is found in sand and quartz, and that is used to make glass
Medical Dictionary
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Spanish Central: Translation of silica Nglish: Translation of silica for Spanish speakers Britannica.com: Encyclopedia article about silica
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