单词	silica
释义	silica noun sil·​i·​ca ˈsi-li-kə  : the dioxide of silicon SiO2 occurring in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively) Example Sentences Recent Examples on the Web According to Healthline, bananas contain the mineral silica. Elizabeth Berry, Woman's Day, 7 Sep. 2022 This exfoliating scrub is infused with hydrated silica, glycerin, and aloe leaf extract to physically slough away dead skin cells while boosting hydration and softness. Kiana Murden, Vogue, 1 Sep. 2022 Pastes typically contain mild abrasives like hydrated silica, sodium bicarbonate and calcium carbonate to polish and remove surface stains and/or low concentrations of the active teeth whitening ingredient hydrogen peroxide to bleach teeth. April Franzino, Good Housekeeping, 30 Aug. 2022 In 2019, Wacker added production of pyrogenic silica. From Usa Today Network And Wire Reports, USA TODAY, 29 July 2022 Near Iceland's gateway Keflavík Airport, the country's most popular place for a silica mask and a soak is often the country's most crowded. Katie Lockhart, CNN, 26 July 2022 Krehenwinkel explains that with only an envelope, a Ziploc bag and some silica packets—like the ones that come in pill bottles to absorb moisture—kids can quickly collect and dry plants for use in future eDNA research. Sam Zlotnik, Smithsonian Magazine, 20 July 2022 Bamboo extract, which is naturally rich in silica, provides gentle exfoliation to the top layers of skin and promotes an overall smoother, healthier appearance. Rolling Stone, 20 May 2022 Hollinger worked with the Smithsonian’s Digitization Program Office (DPO) to 3-D print the pipe replicas with silica. Rachel Parsons, Scientific American, 29 June 2022 See More Word History Etymology New Latin, from Latin silic-, silex hard stone, flint First Known Use circa 1801, in the meaning defined above Phrases Containing silica silica gel vitreous silica silica gel vitreous silica Medical Definition silica noun sil·​i·​ca ˈsil-i-kə  : 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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