Search the Dictionary

h or greenish masses having a greasy luster, as the variety elæolite. It is a silicate of aluminia, soda, and potash.

Slander; detraction; calumny. [Obs.] Barrow.

A dark green aluminous variety of amphibole, or hornblende.

lized and in cleavable masses, usually white, or nearly so, in color. It is a silicate of aluminia and lithia.

A hydrous silicate of aluminia, lime, and soda, a zeolitic mineral commonly occurring in complex twin crystals, often cruciform in shape; -- called also christianite.

erally a peculiar bronze-red or copperlike color and a pearly luster. It is a silicate of aluminia, with magnesia, potash, and some fluorine. It is characteristic of crystalline limestone or dolomite and serpentine. See Mica.

n apple-green mineral having a greasy feel. It is a hydrous silicate of nickel, magnesia, aluminia, and iron.

ing quartz, occurring with castor or castorite on the island of Elba. It is a silicate of alumina and cæsia. Called also pollux.

dal or mammillary structure, and rarely in distinct crystals. It is a hydrous silicate of alumina and lime.

res which phosphoresce or ignite spontaneously on exposure to air, as a heated mixture of alum, potash, and charcoal, or a mixture of charcoal and finely divided lead.

white or greenish color and pearly luster, consisting chiefly of the hydrous silicate of alumina.

alite, coccolite, augite, etc. They are all silicates of lime and magnesia with sometimes alumina and iron. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basalt, gabbro, etc.

The European ringdove (Columba palumbus); the cushat. [Written also quist, queeze, quice, queece.] See Ringdove.

A fluoride of alumina and soda occurring with the Greenland cryolite in octahedral crystals.

A European wild pigeon (Columba palumbus) having a white crescent on each side of the neck, whence the name. Called also wood pigeon, and cushat.

een color and micaceous structure, belonging to the chlorite group; a hydrous silicate of alumina, magnesia, and iron; -- called also clinochlore.

A tank in which alum is crystallized from a solution.

., etc.; -- said of numerals, as distinguished from the Arabic numerals, 1, 4, etc. Roman alum (Chem.), a cubical potassium alum formerly obtained in large quantities from Italian alunite, and highly valued by dyers on account of its freedom from iron. -- Roman balance, a form of balance nearly resembling the modern s…

A green micaceous mineral occurring in minute scales. It is essentially a silicate of aluminia and potash containing vanadium.

ble salt (Chem.), a salt regarded as formed by the union of two distinct salts, as common alum, potassium aluminium sulphate. See under Double. -- Epsom salts. See in the Vocabulary. -- Essential salt (Old Chem.), a salt obtained by crystalizing plant juices. -- Ethereal salt. (Chem.) See under Ethereal. -- Glauber…