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Containing water; watery.

Destitute of water; as, anhydrous salts or acids.

Having water within; containing fluid drops; -- said of certain crystals.

A white fibrous mineral frequently found on the walls of mines and quarries, chiefly hydrous sulphate of alumina; -- also called feather alum, and hair salt.

A mineral of a white a slightly bluish color, usually massive. It is anhydrous sulphate of lime, and differs from gypsum in not containing water (whence the name).

rring in square prisms or octahedrons with pearly luster on the cleavage surface. It is a hydrous silicate of calcium and potassium.

A hydrous carbonate of copper and zinc, found in pale green or blue crystalline aggregations. It yields a kind of brass on reduction.

Hydrous carbonate of bismuth, an earthy mineral of a dull white or yellowish color. [Written also bismuthite.]

A hydrous sulphate of magnesium and sodium.

erate various substances. It was formerly used in medicine. It is composed essentially of hydrous silicates of alumina, or more rarely of magnesia. See Clay, and Terra alba.

A hydrous sulphate of iron of a deep red color. It often occurs in botryoidal form.

rare zeolitic mineral occurring in white monoclinic crystals with pearly luster. It is a hydrous silicate of aluminia, baryta, and strontia.

] -- Brown coal, wood coal. See Lignite. -- Brown hematite or Brown iron ore (Min.), the hydrous iron oxide, limonite, which has a brown streak. See Limonite. -- Brown holland. See under Holland. -- Brown paper, dark colored paper, esp. coarse wrapping paper, made of unbleached materials. -- Brown spar (Min.), a fe…

An apple-green mineral, a hydrous arseniate of nickel, cobalt, and magnesia; -- so named from the Sierra Cabrera, Spain.

A hydrous phosphate of iron occurring in yellow radiated tufts. The phosphorus seriously injures it as an iron ore.

A mineral, the hydrous silicate of zinc.

A hydrous sulphate of copper and lead, found in some parts of Caledonia or Scotland.

A hydrous chloride of potassium and magnesium, sometimes found associated with deposits of rock salt.

A mineral of a brownish of cherry-red color, commonly massive. It is a hydrous silicate of cerium and allied metals.

A hydrous silicate of magnesium, allied to serpentine, occurring in waxlike masses of a yellow or greenish color.