Definition of magnesia

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Magnesia (n.) A light earthy white substance, consisting of magnesium oxide, 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..

Lern More About Magnesia

Biotite :: Biotite (n.) Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica..
Cabrerite :: Cabrerite (n.) An apple-green mineral, a hydrous arseniate of nickel, cobalt, and magnesia; -- so named from the Sierra Cabrera, Spain..
Periclasite :: Periclasite (n.) A grayish or dark green mineral, consisting essentially of magnesia (magnesium oxide), occurring in granular forms or in isometric crystals..
Bronzite :: Bronzite (n.) A variety of enstatite, often having a bronzelike luster. It is a silicate of magnesia and iron, of the pyroxene family..
Iolite :: Iolite (n.) A silicate of alumina, iron, and magnesia, having a bright blue color and vitreous luster; cordierite. It is remarkable for its dichroism, and is also called dichroite..
Ripidolite :: Ripidolite (n.) A translucent mineral of a green color and micaceous structure, belonging to the chlorite group; a hydrous silicate of alumina, magnesia, and iron; -- called also clinochlore..
Spinel :: Spinelle (n.) A mineral occuring in octahedrons of great hardness and various colors, as red, green, blue, brown, and black, the red variety being the gem spinel ruby. It consist essentially of alumina and magnesia, but commonly contains iron and sometimes also chromium..
Saponite :: Saponite (n.) A hydrous silicate of magnesia and alumina. It occurs in soft, soapy, amorphous masses, filling veins in serpentine and cavities in trap rock..
Limestone :: Limestone (n.) A rock consisting chiefly of calcium carbonate or carbonate of lime. It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble..
Magnesian :: Magnesian (a.) Pertaining to, characterized by, or containing, magnesia or magnesium..
Absorbent :: Absorbent (n.) Any substance which absorbs and neutralizes acid fluid in the stomach and bowels, as magnesia, chalk, etc.; also a substance e. g., iodine) which acts on the absorbent vessels so as to reduce enlarged and indurated parts..
Warwickite :: Warwickite (n.) A dark brown or black mineral, occurring in prismatic crystals imbedded in limestone near Warwick, New York. It consists of the borate and titanate of magnesia and iron..
Wagnerite :: Wagnerite (n.) A fluophosphate of magnesia, occurring in yellowish crystals, and also in massive forms..
Earth :: Earth (n.) A similar oxide, having a slight alkaline reaction, as lime, magnesia, strontia, baryta..
Meerschaum :: Meerschaum (n.) A fine white claylike mineral, soft, and light enough when in dry masses to float in water. It is a hydrous silicate of magnesia, and is obtained chiefly in Asia Minor. It is manufacturd into tobacco pipes, cigar holders, etc. Also called sepiolite..
Gymnite :: Gymnite (n.) A hydrous silicate of magnesia.
Zechstein :: Zechstein (n.) The upper division of the Permian (Dyas) of Europe. The prevailing rock is a magnesian limestone.
Crotonine :: Crotonine (n.) A supposed alkaloid obtained from croton oil by boiling it with water and magnesia, since found to be merely a magnesia soap of the oil..
Vesuvianite :: Vesuvianite (n.) A mineral occurring in tetragonal crystals, and also massive, of a brown to green color, rarely sulphur yellow and blue. It is a silicate of alumina and lime with some iron magnesia, and is common at Vesuvius. Also called idocrase..
Serpentine :: Serpentine (n.) A mineral or rock consisting chiefly of the hydrous silicate of magnesia. It is usually of an obscure green color, often with a spotted or mottled appearance resembling a serpent's skin. Precious, or noble, serpentine is translucent and of a rich oil-green color..
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