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An oxide having four atoms of oxygen in the molecule; a quadroxide; as, osmium tetroxide, OsO.

lved from potassium chlorate and hydrochloric acid. It is supposed to consist of chlorine tetroxide with some free chlorine.

ence higher than in other lower compounds; as, osmic oxide. Osmic acid. (Chem.) (a) Osmic tetroxide. [Obs.] (b) Osmic acid proper, an acid analogous to sulphuric acid, not known in the free state, but forming a well-known and stable series of salts (osmates), which were formerly improperly called osmites. -- Osmic tet…

s a 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.

A tetroxide. [R.]

ubstance or ingredient denoted by the term to which it is prefixed, as in tetra-chloride, tetroxide.