Osmic tetroxide

Osmic tetroxide
Osmic Os"mic, a. (Chem.) Pertaining to, derived from, or containing, osmium; specifically, designating those compounds in which it has a valence higher than in other lower compounds; as, osmic oxide. [1913 Webster]

{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 tetroxide} (Chem.), a white volatile crystalline substance, {OsO4}, the most stable and characteristic of the compounds of osmium. It has a burning taste, and gives off a vapor, which is a powerful irritant poison, violently attacking the eyes, and emitting a strong chlorinelike odor. Formerly improperly called {osmic acid}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Osmic — Os mic, a. (Chem.) Pertaining to, derived from, or containing, osmium; specifically, designating those compounds in which it has a valence higher than in other lower compounds; as, osmic oxide. [1913 Webster] {Osmic acid}. (Chem.) (a) Osmic… …   The Collaborative International Dictionary of English

  • Osmic acid — Osmic Os mic, a. (Chem.) Pertaining to, derived from, or containing, osmium; specifically, designating those compounds in which it has a valence higher than in other lower compounds; as, osmic oxide. [1913 Webster] {Osmic acid}. (Chem.) (a) Osmic …   The Collaborative International Dictionary of English

  • osmic acid — Osmic Os mic, a. (Chem.) Pertaining to, derived from, or containing, osmium; specifically, designating those compounds in which it has a valence higher than in other lower compounds; as, osmic oxide. [1913 Webster] {Osmic acid}. (Chem.) (a) Osmic …   The Collaborative International Dictionary of English

  • osmic acid — noun Etymology: International Scientific Vocabulary osmic + acid 1. : a hypothetical acid H2OsO4 known especially in the form of salts (as potassium osmate K2OsO4.2H2O) obtainable from osmium tetroxide in alkaline solution 2. : osmium tetroxide …   Useful english dictionary

  • osmic acid — OsO4; a volatile caustic and strong oxidizing agent; colorless crystals, poorly soluble in water, but soluble in organic solvents; the aqueous solution is a fat and myelin stain and a general fixative …   Medical dictionary

  • osmic acid — noun Chemistry a solution of osmium tetroxide, a poisonous yellow compound used as a biological stain. Origin C19: osmic from osmium + ic …   English new terms dictionary

  • osmic acid — noun Date: 1842 osmium tetroxide …   New Collegiate Dictionary

  • osmic acid — noun a supposed acid formed from osmium tetroxide but known only as osmate salts …   Wiktionary

  • osmic acid — see osmium tetroxide …   The new mediacal dictionary

  • osmium tetroxide — osmic acid a colourless or faintly yellowish compound used to stain fats or as a fixative in the preparation of tissues for microscopical study. Osmium tetroxide evaporates readily, the vapour having a toxic action on the eyes, skin, and… …   The new mediacal dictionary

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