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sting of the carbonate of lime and magnesia in varying proportions. It occurs in distinct crystals, and in extensive beds as a compact limestone, often crystalline granular, either white or clouded. It includes much of the common white marble. Also called bitter spar.

A counterfeit gem, composed of two pieces of crystal, with a color them, and thus giving the appearance of a naturally colored gem. Also, a piece of paste or glass covered by a veneer of real stone.

he drought of March hath pierced to the root. Chaucer. In a drought the thirsty creatures cry. Dryden.

in martial music; one of the pair of tympani in an orchestra, or cavalry band. The drums cry bud-a-dub. Gascoigne.

A cavity in a rock, having its interior surface studded with crystals and sometimes filled with water; a geode.

Covered with a large number of minute crystals.

of a dry powdery dust, often accompanied by the presence of a peculiar fungus (Merulius lacrymans), which is sometimes considered the cause of the decay; but it is more probable that the real cause is the decomposition of the wood itself. D. C. Eaton. Called also sap rot, and, in the United States, powder post. Hebert.…

A colorless, crystalline, aromatic hydrocarbon, C6H2(CH3)4, off artificial production, with an odor like camphor.

The Apocryphal book of Ecclesiasticus. [Obs.]

A book of the Apocrypha.

A colorless, crystalline, nitrogenous base, obtained by the decomposition of cocaine.

A grayish white zeolitic mineral, in tetragonal crystals. It is a hydrous silicate of alumina and baryta.

To change on the surface, or throughout, to a whitish, mealy, or crystalline powder, from a gradual decomposition, esp. from the loss of water, on simple exposure to the air; as, Glauber's salts, and many others, effloresce.

A compound or twin crystal made up of eight individuals.

ena of double refraction and their relation to the elastic force of the luminous ether in crystalline media.

merly Motordica Elaterium) and other related species. It is extracted as a bitter, white, crystalline substance, which is a violent purgative.

transparent, colorless oil obtained from elemi resin by distillation with water; also, a crystallizable extract from the resin.

or derived from, gallnuts or gallic acid; as, ellagic acid. Ellagic acid (Chem.), a white crystalline substance, C14H8O9, found in bezoar stones, and obtained by the oxidation of gallic acid.

niate of copper; green bice; Scheele's green; -- also used adjectively; as, emerald green crystals. -- Emerald Isle, a name given to Ireland on account of the brightness of its verdure. -- Emerald spodumene, or Lithia emerald. (Min.) See Hiddenite. -- Emerald nickel. (Min.) See Zaratite.

A white crystalline bitter alkaloid extracted from ipecacuanha root, and regarded as its peculiar emetic principle.