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Capable of being converted into an oxide.

Existing in the state of a protoxide; -- said of an oxide. [R.]

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

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

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.

ds 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.…

Act, process, or result of peroxidizing; oxidation to a peroxide.

To oxidize to the utmost degree, so as to form a peroxide.

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.]

nstructive metabolism by which carbohydrates are formed from water vapor and the carbon dioxide of the air in the chlorophyll-containing tissues of plants exposed to the action of light. It was formerly called assimilation, but this is now commonly used as in animal physiology. The details of the process are not yet cl…

A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.

ounds in which it has a higher valence as contrasted with plumbous compounds; as, plumbic oxide.

Manganese dioxide, occurring in tetragonal crystals nearly as hard as quartz.

Impure zinc oxide.

The hydroxide of potassium hydrate, a hard white brittle substance, KOH, having strong caustic and alkaline properties; -- hence called also caustic potash.