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Silicosis is a long-term lung disease caused by inhaling very tiny crystalline particles of silicon dioxide, or silica, according to the Cleveland Clinic.—Vanessa Etienne, PEOPLE, 10 Dec. 2025 Quartz—or more technically, silicon dioxide or silica—is the main component of sand.—IEEE Spectrum, 22 Sep. 2025 The interdisciplinary team came up with 12 different potential recipes using varying percentages of silicon dioxide, copper, calcium, and sodium carbonate.—ArsTechnica, 30 June 2025 Amorphous silicon dioxide commonly occurs in foods and supplements, while crystalline silicon dioxide is generally found in industrial settings.—Brittany Lubeck, Ms, Rdn, Verywell Health, 19 Sep. 2024 See All Example Sentences for silicon dioxide