What is the meaning of Alumina?

(n.) One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). alumina. Retrieved September 27, 2026, from http://smartdefine.org/alumina/definitions/1972833
ChicagoWebster's. 2011. "alumina" http://smartdefine.org/alumina/definitions/1972833 (accessed September 27, 2026).
HarvardWebster's 2011, alumina, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/alumina/definitions/1972833>.
MLAWebster's. "alumina" 27 May 2011. Web. 27 September 2026. <http://smartdefine.org/alumina/definitions/1972833>
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