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rhodium

[roh-dee-uh m] /ˈroʊ di əm/
noun, Chemistry
1.
a silvery-white metallic element of the platinum family, forming salts that give rose-colored solutions: used to electroplate microscopes and instrument parts to prevent corrosion. Symbol: Rh; atomic weight: 102.905; atomic number: 45; specific gravity: 12.5 at 20°C.
Origin
1804
1804; < Neo-Latin; see rhod-, -ium
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for rhodium
  • The low- and medium-level radioactive material includes toxic uranium, rhodium, and plutonium.
  • These holes are lined with a thin metal oxide and small particles of platinum and rhodium.
British Dictionary definitions for rhodium

rhodium

/ˈrəʊdɪəm/
noun
1.
a hard corrosion-resistant silvery-white element of the platinum metal group, occurring free with other platinum metals in alluvial deposits and in nickel ores. It is used as an alloying agent to harden platinum and palladium. Symbol: Rh; atomic no: 45; atomic wt: 102.90550; valency: 2–6; relative density: 12.41; melting pt: 1963±3°C; boiling pt: 3697±100°C
Word Origin
C19: New Latin, from Greek rhodon rose, from the pink colour of its compounds
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
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Word Origin and History for rhodium
n.

hard white metallic element, 1804, Modern Latin, coined by its discoverer, English physician William H. Wollaston (1766-1828), and named for the color of solutions containing it, from Greek rhodon "rose" (see rose (n.1)) + metallic element ending -ium.

Online Etymology Dictionary, © 2010 Douglas Harper
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rhodium in Medicine

rhodium rho·di·um (rō'dē-əm)
n.
Symbol Rh
A hard durable metallic element. Atomic number 45; atomic weight 102.905; melting point 1,964°C; boiling point 3,700°C; specific gravity 12.41; valence 2, 3, 4, 5, 6.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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rhodium in Science
rhodium
  (rō'dē-əm)   
Symbol Rh
A rare, silvery-white metallic element that is hard, durable, and resistant to acids. It is used as a permanent plating for jewelry and is added to platinum to make high-temperature alloys. Atomic number 45; atomic weight 102.905; melting point 1,966°C; boiling point 3,727°C; specific gravity 12.41; valence 2, 3, 4, 5, 6. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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