"calcium oxide." YourDictionary, n.d. Web. 15 September 2018. <http://www.yourdictionary.com/calcium-oxide>.
calcium oxide. (n.d.). Retrieved September 15th, 2018, from http://www.yourdictionary.com/calcium-oxide
A white, caustic, lumpy powder, CaO, used as a refractory, as a flux, in glassmaking, in waste treatment, in insecticides, as an industrial alkali, and in manufacturing steel, paper, and building materials. Also called calx . Also called lime3. Also called quicklime .