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hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 191.1. Specific gravity 22.477.

N3O4) not known in the free state, but obtained, in combination with its salts, by a slow oxidation of uric acid, to which it is related.

To unite, or cause to combine, with oxygen; to treat with oxygen; to oxidize; as, oxygenated water (hydrogen dioxide).

The act or process of combining or of treating with oxygen; oxidation.

An oxidizer.

Oxidizable.

To oxidize.

Oxidation.

An earthy-looking ore, consisting of brown oxide of iron with minute particles of native silver. Ure.

Pertaining to, or designating, a nitrogenous acid which is obtained by the oxidation of uric acid, as a white crystalline substance (C3N2H2O3); -- also called oxalyl urea.

gree of five, either as regards quality, property, or composition; as, pentasulphide; pentoxide, etc. Also used adjectively.

ng, an acid of sulphur obtained by leading hydrogen sulphide into a solution of sulphur dioxide; -- so called because it contains five atoms of sulphur.

ly that the element has a higher valence than in other similar compounds; thus, barium peroxide is the highest oxide of barium; while nitrogen and manganese peroxides, so-called, are not the highest oxides of those elements.

Pertaining to, or designating, a certain one of the highly oxidized compounds of chromium, which has a deep blue color, and is produced by the action of hydrogen peroxide.

A grayish or dark green mineral, consisting essentially of magnesia (magnesium oxide), occurring in granular forms or in isometric crystals.

xed. Dryden. Permanent gases (Chem. & Physics), hydrogen, oxygen, nitrogen, and carbon monoxide; -- also called incondensible or incoercible gases, before their liquefaction in 1877. -- Permanent way, the roadbed and superstructure of a finished railway; -- so called in distinction from the contractor's temporary way.…

ven to the salts supposed to be formed respectively by neutralizing acids with certain peroxides. [Obsoles.]

A sulphate of the peroxide of any base. [R.]

or, resembling the quinones, and obtained from beechwood tar and coal tar, as also by the oxidation of xylidine; -- called also xyloquinone.

ds, but containing two hydrocarbon radicals, and derived from the secondary phosphines by oxidation.