magnesia
mag.ne.sia \mag-'ne--sh*, -'ne--zh*\ \-sh*n, -zh*n\ n [NL, fr. magnes carneus, a white earth, lit., flesh magnet] 1: a white highly infusible magnesium oxide used esp. in refractories, in c ements, insulation, fertilizers, and rubber, and in medicine as an antacid and mild laxative 2: MAGNESIUM - mag.ne.sian aj