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Oxycalcium :: Oxycalcium (a.) Of or pertaining to oxygen and calcium; as, the oxycalcium light. See Drummond light..

Microlite :: Microlite (n.) A rare mineral of resinous luster and high specific gravity. It is a tantalate of calcium, and occurs in octahedral crystals usually very minute..

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..

Polyacid :: Polyacid (a.) Capable of neutralizing, or of combining with, several molecules of a monobasic acid; having more than one hydrogen atom capable of being replaced by acid radicals; -- said of certain bases; as, calcium hydrate and glycerin are polyacid bases..

Dyad :: Dyad (a.) Having a valence or combining power of two; capable of being substituted for, combined with, or replaced by, two atoms of hydrogen; as, oxygen and calcium are dyad elements. See Valence..

Hydroxide :: Hydroxide (n.) A hydrate; a substance containing hydrogen and oxygen, made by combining water with an oxide, and yielding water by elimination. The hydroxides are regarded as compounds of hydroxyl, united usually with basic element or radical; as, calcium hydroxide ethyl hydroxide..

Sphene :: Sphene (n.) A mineral found usually in thin, wedge-shaped crystals of a yellow or green to black color. It is a silicate of titanium and calcium; titanite..

Stalactite :: Stalactite (n.) A pendent cone or cylinder of calcium carbonate resembling an icicle in form and mode of attachment. Stalactites are found depending from the roof or sides of caverns, and are produced by deposition from waters which have percolated through, and partially dissolved, the overlying limestone rocks..

Whewellite :: Whewellite (n.) Calcium oxalate, occurring in colorless or white monoclinic crystals..

Tachhydrite :: Tachhydrite (n.) A hydrous chloride of calcium and magnesium occurring in yellowish masses which rapidly deliquesce upon exposure. It is found in the salt mines at Stassfurt.

Nitromagnesite :: Nitromagnesite (n.) Nitrate of magnesium, a saline efflorescence closely resembling nitrate of calcium..

Baryto-calcite :: Baryto-calcite (n.) A mineral of a white or gray color, occurring massive or crystallized. It is a compound of the carbonates of barium and calcium..

Exsiccator :: Exsiccator (n.) An apparatus for drying substances or preserving them from moisture; a desiccator; also, less frequently, an agent employed to absorb moisture, as calcium chloride, or concentrated sulphuric acid..

Yttro-cerite :: Yttro-cerite (n.) A mineral of a violet-blue color, inclining to gray and white. It is a hydrous fluoride of cerium, yttrium, and calcium..

Metal :: Metal (n.) An elementary substance, as sodium, calcium, or copper, whose oxide or hydroxide has basic rather than acid properties, as contrasted with the nonmetals, or metalloids. No sharp line can be drawn between the metals and nonmetals, and certain elements partake of both acid and basic qualities, as chromium, manganese, bismuth, etc..

Calcic :: Calcic (a.) Pertaining to, derived from, or containing, calcium or lime..

Cipolin :: Cipolin (n.) A whitish marble, from Rome, containiing pale greenish zones. It consists of calcium carbonate, with zones and cloudings of talc..

Strontium :: Strontium (n.) A metallic element of the calcium group, always naturally occurring combined, as in the minerals strontianite, celestite, etc. It is isolated as a yellowish metal, somewhat malleable but harder than calcium. It is chiefly employed (as in the nitrate) to color pyrotechnic flames red. Symbol Sr. Atomic weight 87.3..

Thomsenolite :: Thomsenolite (n.) A fluoride of aluminium, calcium, and sodium occurring with the cryolite of Greenland..

Effloresce :: Effloresce (v. i.) To become covered with a whitish crust or light crystallization, from a slow chemical change between some of the ingredients of the matter covered and an acid proceeding commonly from an external source; as, the walls of limestone caverns sometimes effloresce with nitrate of calcium in consequence of the action in consequence of nitric acid formed in the atmosphere..

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