a white, water-insoluble powder, Mg 3 (AsO 4) 2 ⋅xH 2 O, used chiefly as an insecticide.
noun, Chemistry. 1. a white powder, MgCO 3 , insoluble in water and alcohol, soluble in acids, used in dentifrices and cosmetics, in medicine as an antacid, and as a refractory material.
noun, Chemistry. 1. a white, crystalline, slightly water-soluble powder, Mg(OH) 2 , used chiefly in medicine as an antacid and as a laxative. magnesium hydroxide n. A white powder used as an antacid and a laxative.
noun 1. the strongly actinic white light produced when magnesium is burned: used in photography, signaling, pyrotechnics, etc.
noun, Chemistry. 1. . noun 1. a white tasteless substance occurring naturally as periclase: used as an antacid and laxative and in refractory materials, such as crucibles and fire bricks. Formula: MgO Also called magnesia magnesium oxide n. A white powdery compound having a high melting point (2,800°C), used in food packaging, cosmetics, and pharmaceuticals.