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A mineral occurring in transparent emerald green crystals. It is hydrous arseniate of copper.

A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina and glucina.

A colorless, crystalline substance extracted from oil of cloves; -- called also clove camphor.

A yellow, crystalline substance, resembling aurin, and obtained by the oxidation of pittacal; -- called also eupittonic acid. [Written also eupitton.]

pertaining to, derived from, or resembling, euxanthin. Euxanthic acid (Chem.), a yellow, crystalline, organic acid, extracted from euxanthin.

A nonnitrogenous, crystalline body, present in small quantity in human fæces.

anse." Savage. Lights . . . high in the expanse of heaven. Milton. The smooth expanse of crystal lakes. Pope.

ry Ligament; k Prosterior Aqueous Chamber between h and i; l Anterior Aqueous Chamber; m Crystalline Lens; n Vitreous Humor; o Retina; p Yellow spot; q Center of blind spot; r Artery of Retina in center of the Optic Nerve.

ist . . . watered the whole face of the ground. Gen. ii. 6. Lake Leman wooes me with its crystal face. Byron.

A stratum in crystalline rock, containing metallic sulphides. Raymond.

A black, greenish, or brownish mineral of the chrysolite group. It is a silicate of iron.

A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case, baryta. They occur in crystals and crystalline masses, vitreous in luster, and breaking rather easily in two directions at right angles to each other, or nearly so. The…

Pertaining to, or derived from, a ferricyanide. Ferricyanic acid (Chem.), a brown crystalline substance, H6(CN)12Fe2, obtained from potassium ferricyanide, and regarded as the type of the ferricyanides; -- called also hydro-ferricyanic acid, hydrogen ferricyanide, etc.

d some other base. Potassium ferricyanide (Chem.), red prussiate of potash; a dark, red, crystalline salt, K6(CN)12Fe2, consisting of the double cyanide of potassium and ferric iron. From it is derived the ferrous ferricyanate, Turnbull's blue.

ning to, derived from, or designating, a ferrocyanide. ferrocyanic acid (Chem.), a white crystalline substance, H4(CN)6Fe, of strong acid properties, obtained from potassium ferrocyanide, and regarded as the type of the ferrocyanides; -- called also hydro- ferrocyanic acid, hydrogen ferrocyanide. etc.…

other base. Potassium ferrocyanide (Chem.), yellow prussiate of potash; a tough, yellow, crystalline salt, K4(CN)6Fe, the starting point in the manufacture of almost all cyanogen compounds, and the basis of the ferric ferrocyanate, prussian blue. It is obtained by strongly heating together potash, scrap iron, and anima…

A perennial plant (Pyrethrum, or Chrysanthemum, Parthenium) allied to camomile, having finely divided leaves and white blossoms; -- so named from its supposed febrifugal qualities.

A white crystallized mineral resin from the Fichtelgebirge, Bavaria.

To indicate by numerals; also, to compute. As through a crystal glass the figured hours are seen. Dryden.

e rapid discharge of firearms in succession by a line of troops. -- St. Anthony's fire, erysipelas; -- an eruptive fever which St. Anthony was supposed to cure miraculously. Hoblyn. -- St. Elmo's fire. See under Saint Elmo. -- To set on fire, to inflame; to kindle. -- To take fire, to begin to burn; to fly into a p…