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osmious |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Osmious \Os"mi*ous\, a. (Chem.) Denoting those compounds of osmium in which the element has a valence relatively lower than in the osmic compounds; as osmious chloride. [Written also {osmous}.] {Osmious acid} (Chem.), an acid derived from osmium, analogous to sulphurous acid, and forming unstable salts. It is a brown amorphous substance.