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silica
Part of speech: NounIn chemistry, silicon dioxide; quartz; opal.
Usage examples "silica":- But silica and most other substances show a diminished percentage. - "The Birth-Time of the World and Other Scientific Essays", J. (John) Joly.
- In the table are two columns headed " Soluble Silica" and " Alumina," in both of which it is evident that a very much larger per cent is found in the arid than in the humid soils. - "Dry-Farming", John A. Widtsoe.
- In almost any part of the world to which you may chance to go you will find Silica. - "Round-about Rambles in Lands of Fact and Fancy", Frank Richard Stockton.