osmium

[ oz-mee-uhm ]

/ ˈɒz mi əm /

noun Chemistry.

a hard, heavy, metallic element having the greatest density of the known elements and forming octavalent compounds, as OsO4 and OsF8: used chiefly as a catalyst, in alloys, and in the manufacture of electric-light filaments. Symbol: Os; atomic weight: 190.2; atomic number: 76; specific gravity: 22.57.

Origin of osmium

1795–1805; <New Latin <Greek osm(ḗ) smell + -ium-ium; named from the penetrating odor of one of its oxides

Words nearby osmium

osmics, osmidrosis, osmiophilic, osmious, osmiridium, osmium, osmium tetroxide, osmo-, osmolality, osmolarity, osmole

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for osmium

The tantalum filament was quickly followed by osmium and by tungsten in this country.
Artificial Light|M. Luckiesh
There are four chlorides of osmium, the best known of which are the dichloride and the tetrachloride.
Cooley's Practical Receipts, Volume II|Arnold Cooley
Iridium occurs in nature associated with osmium, gold, and platinum, in the mines of Russia.
A System of Instruction in the Practical Use of the Blowpipe|Anonymous
The gold may contain an alloy of osmium and iridium; if so, it should be weighed and treated with aqua regia.
A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer

There are several rare metals, such as iridium and osmium, which would likewise be far too valuable to circulate.
Readings in Money and Banking|Chester Arthur Phillips

British Dictionary definitions for osmium

osmium

/ (ˈɒzmɪəm) /

noun

a very hard brittle bluish-white metal occurring with platinum and alloyed with iridium in osmiridium: used to produce platinum alloys, mainly for pen tips and instrument pivots, as a catalyst, and in electric-light filaments. Symbol: Os; atomic no: 76; atomic wt: 190.2; valency: 0 to 8; relative density: 22.57; melting pt: 3033±30°C; boiling pt: 5012±100°C

Word Origin for osmium

C19: from Greek osmē smell, so called from its penetrating odour

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for osmium

osmium

[ ŏz′mē-əm ]

n. Symbol Os

A hard metallic element, found in small amounts in osmiridium and platinum ores. Atomic number 76.

Scientific definitions for osmium

osmium

[ ŏz′mē-əm ]

Os

A hard, brittle, bluish-white metallic element that is the densest naturally occurring element. It is used to make very hard alloys for fountain pen points, electrical contacts, and instrument pivots. Atomic number 76; atomic weight 190.2; melting point 3,000°C; boiling point 5,000°C; specific gravity 22.57; valence 2, 3, 4, 8. See Periodic Table.

单词	osmium
释义	osmium [ oz-mee-uhm ] / ˈɒz mi əm / noun Chemistry. a hard, heavy, metallic element having the greatest density of the known elements and forming octavalent compounds, as OsO4 and OsF8: used chiefly as a catalyst, in alloys, and in the manufacture of electric-light filaments. Symbol: Os; atomic weight: 190.2; atomic number: 76; specific gravity: 22.57. Origin of osmium 1795–1805; <New Latin <Greek osm(ḗ) smell + -ium-ium; named from the penetrating odor of one of its oxides Words nearby osmium osmics, osmidrosis, osmiophilic, osmious, osmiridium, osmium, osmium tetroxide, osmo-, osmolality, osmolarity, osmole Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for osmium The tantalum filament was quickly followed by osmium and by tungsten in this country. Artificial Light\|M. Luckiesh There are four chlorides of osmium, the best known of which are the dichloride and the tetrachloride. Cooley's Practical Receipts, Volume II\|Arnold Cooley Iridium occurs in nature associated with osmium, gold, and platinum, in the mines of Russia. A System of Instruction in the Practical Use of the Blowpipe\|Anonymous The gold may contain an alloy of osmium and iridium; if so, it should be weighed and treated with aqua regia. A Textbook of Assaying: For the Use of Those Connected with Mines.\|Cornelius Beringer and John Jacob Beringer There are several rare metals, such as iridium and osmium, which would likewise be far too valuable to circulate. Readings in Money and Banking\|Chester Arthur Phillips British Dictionary definitions for osmium osmium / (ˈɒzmɪəm) / noun a very hard brittle bluish-white metal occurring with platinum and alloyed with iridium in osmiridium: used to produce platinum alloys, mainly for pen tips and instrument pivots, as a catalyst, and in electric-light filaments. Symbol: Os; atomic no: 76; atomic wt: 190.2; valency: 0 to 8; relative density: 22.57; melting pt: 3033±30°C; boiling pt: 5012±100°C Word Origin for osmium C19: from Greek osmē smell, so called from its penetrating odour Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for osmium osmium [ ŏz′mē-əm ] n. Symbol Os A hard metallic element, found in small amounts in osmiridium and platinum ores. Atomic number 76. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for osmium osmium [ ŏz′mē-əm ] Os A hard, brittle, bluish-white metallic element that is the densest naturally occurring element. It is used to make very hard alloys for fountain pen points, electrical contacts, and instrument pivots. Atomic number 76; atomic weight 190.2; melting point 3,000°C; boiling point 5,000°C; specific gravity 22.57; valence 2, 3, 4, 8. See Periodic Table. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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