- magnesium oxide, MgO, a white, tasteless powder, used as a mild laxative and antacid, and as an insulating substance, in firebrick, etc.
- hydrated magnesium carbonate, also used as a laxative
Origin of magnesiaModern Latin magnesia (alba), literally , (white) magnesia (in contrast to Medieval Latin magnesia, a black mineral ; from Late Greek magn?sia ; from Magn?sia, Magnesia): term substituted by F. Hoffmann (1660-1742), German physician, for Modern Latin magnes carneus, literally , flesh-magnet (see magnet and amp; carnal): so named from clinging to the lips
Origin of magnesiaShort for New Latin magn&emacron;sia alba, literally, white magnesia : Medieval Latin magn&emacron;sia, mineral ingredient in the philosopher's stone (from Greek magn&emacron;sia, a kind of ore, talc or a talclike substance, after Magn&emacron;si&emacron;, a region of Thessaly where it was found, from Magn&emacron;s, an inhabitant of Thessalian Magnesia) + Latin alba, feminine of albus, white.
- (mineralogy) magnesium oxide
Middle English magnesia, from late Latin magnesia, from Ancient Greek Î¼Î±Î³Î½Î·ÏƒÎ¯Î±, after ÎœÎ±Î³Î½Î·ÏƒÎ¯Î±, a city name in Thessaly, Lydia, and Asia Minor.