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.
随便看	report stage reposal repose reposeful reposit reposition repositor repositorium repository repossess repot repoussage repoussoir repoussé repp repplier repr. reprehend reprehensible reprehension represent representation representational representationalism representative