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Webster 1913 Edition
Magnesia
Mag-ne′si-a
(?; 277)
, Noun.
[L.
Magnesia
, fem. of Magnesius
of the country Magnesia, Gr. ή Μαγνησία λίθοσ
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
. Magnesia alba
[L.]
(Med. Chem.)
, a bulky white amorphous substance, consisting of a hydrous basic carbonate of magnesium, and used as a mild cathartic.
Webster 1828 Edition
Magnesia
MAGNE'SIA
,Noun.
1.
A primitive earth, having for its base a metallic substance, called magnesium. It is generally found in combination with other substances. It is absorbent and antacid, and moderately cathartic.