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A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.

A mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur.

A composition made from blood, mixed with mineral or vegetable substances, used for making buttons, door knobs, etc.

The figure of plants in minerals or fossils.

To form the figures of plants in; -- said in reference to minerals. See Arborized. Herborized stones contain fine mosses. Fourcroy (Trans.)

A lead-gray sectile mineral. It is a telluride of silver.

A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime.

he action. -- Natural history, a description and classification of objects in nature, as minerals, plants, animals, etc., and the phenomena which they exhibit to the senses.

A mineral of brownish black color, occurring in columnar or foliated masses. It is native manganese tungstate.

A mineral of a transparent vitreous brown color, found in the ejected masses of Vesuvius. It is a silicate of iron and magnesia, containing fluorine.

The process of washing ore, or of uncovering mineral veins, by a heavy discharge of water from a reservoir; flushing; -- also called booming.

A system of treating disease by baths and mineral waters.

rence to the action of heated waters in dissolving, redepositing, and otherwise producing mineral changes within the crust of the globe.

An orthorhombic mineral of the pyroxene group, of a grayish or greenish black color, often with a peculiar bronzelike luster (schiller) on the cleavage surface.

An oily substance prepared by the dry distillation of a bituminous mineral containing fossil fishes. It is used in medicine as a remedy in some forms of skin diseases.

Apperaing in distinct crystals; -- said of the mineral constituents of a rock.

A thin crust of some extraneous substance formed on minerals. [R.] A thin crust or illinition of black manganese. Kirwan.

The act or operation of smearing the body with mud, especially with the sediment from mineral springs; a mud bath.

something else; as, imitative colors; imitative habits; dendritic and mammillary forms of minerals are imitative. -- Im"i*ta*tive*ly, adv. -- Im"i*ta*tive*ness, n.

eign substance, either liquid or solid, usually of minute size, inclosed in the mass of a mineral.