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An earthy substance originally brought from Tripoli, used in polishing stones and metals. It consists almost wholly of the siliceous shells of diatoms.

A yellow, earthy incrustation, consisting essentially of the oxide of uranium, but more or less impure.

growing darker on exposure. It occurs in monoclinic crystals, also fibrous, massive, and earthy.

A soft, earthy, dark-colored rock or clay derived from the alteration of basalt.

An earthy oxide of manganese, or mixture of different oxides and water, with some oxide of iron, and often silica, alumina, lime, or baryta; black ocher. There are several varieties.

hes. -- Washing soda. (Chem.) See Sodium carbonate, under Sodium. -- Washing stuff, any earthy deposit containing gold enough to pay for washing it; -- so called among gold miners.

To tend; to guard; to have in keeping. And flaming ministers, to watch and tend Their earthy charge. Milton. Paris watched the flocks in the groves of Ida. Broome.

Tin ore freed from earthy matter by stamping. Knight.

Like or pertaining to a worm; earthy; groveling.

. -- Yellow metal. Same as Muntz metal, under Metal. -- Yellow ocher (Min.), an impure, earthy variety of brown iron ore, which is used as a pigment. -- Yellow oxeye (Bot.), a yellow-flowered plant (Chrysanthemum segetum) closely related to the oxeye daisy. -- Yellow perch (Zoöl.), the common American perch. See Pe…

A pigment obtained, usually by roasting cobalt glance with sand or quartz, as a dark earthy powder. It consists of crude cobalt oxide, or of an impure cobalt arseniate. It is used in porcelain painting, and in enameling pottery, to produce a blue color, and is often confounded with smalt, from which, however, it is dis…

ers of zinc, oxide of zinc] (Min.), hydrous carbonate of zinc, usually occurring in white earthy incrustations; -- called also hydrozincite. -- Zinc ethyl (Chem.), a colorless, transparent, poisonous liquid, composed of zinc and ethyl, which takes fire spontaneously on exposure to the atmosphere. -- Zinc green, a gre…