Found 2 items, similar to magnesia.
English → English (WordNet) Definition: magnesia magnesia n : a white solid mineral that occurs naturally as periclase; a source of magnesium [syn: periclase, magnesium oxide]
English → English (gcide) Definition: Magnesia Magnesia \Mag*ne"si*a\ (?; 277), n. [L. Magnesia, fem. of Magnesius of the country Magnesia, Gr. h` Magnhsi`a li`qos a magnet. Cf. Magnet.] (Chem.) A light earthy white substance, consisting of magnesium oxide (MgO), and obtained by heating magnesium hydrate or carbonate, or by burning magnesium. It has a slightly alkaline reaction, and is used in medicine as a mild antacid laxative. See Magnesium. [1913 Webster] Magnesia alba [L.] (Med. Chem.), a bulky white amorphous substance, consisting of a hydrous basic carbonate of magnesium, and used as a mild cathartic. [1913 Webster]