01 a. Denoting those compounds of osmium in which the element has a valence relatively lower than in the osmic compounds; as, osmious chloride.
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1.
Denoting those compounds of osmium in which the element has a valence relatively lower than in the osmic compounds; as, osmious chloride.(Chem.)
Phrases & compounds
Osmious acid —
an acid derived from osmium, analogous to sulphurous acid, and forming unstable salts. It is a brown amorphous substance.