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chromium

[kroh-mee-uh m] /ˈkroʊ mi əm/
noun
1.
a lustrous, hard, brittle, metallic element used in alloy steels for hardness and corrosion resistance, as in stainless steel, and for plating other metals: chromium salts are used as pigments and mordants. Symbol: Cr; atomic weight: 51.996; atomic number: 24; specific gravity: 7.1.
2.
chrome (def 2).
Origin
1800-1810
1800-10; chrome + -ium
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for chromium
  • Isolation and partial characterization of chromium complex from alfalfa.
  • And dragon blood is intensely acidic, which means that you'd want the corrosion resistance offered by high-chromium steel.
  • chromium and nickel can find their way out of steel, but the amounts would be miniscule to nil.
  • Arsenic, radon and chromium are carcinogens, uranium and cadmium can damage kidneys and manganese might have neurological effects.
  • They will measure the ratios of chromium isotopes, and look for one that is characteristic of meteorites.
  • Though native chromium deposits are rare, some native chromium metal has been discovered.
  • chromium is what makes a ruby red, and therefore is used in producing synthetic rubies.
British Dictionary definitions for chromium

chromium

/ˈkrəʊmɪəm/
noun
1.
a hard grey metallic element that takes a high polish, occurring principally in chromite: used in steel alloys and electroplating to increase hardness and corrosion-resistance. Symbol: Cr; atomic no: 24; atomic wt: 51.9961; valency: 2, 3, or 6; relative density: 7.18–7.20; melting pt: 1863±20°C; boiling pt: 2672°C
Word Origin
C19: from New Latin, from French: chrome
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for chromium
chromium
1807, from Fr. chrome + element ending -ium.
Online Etymology Dictionary, © 2010 Douglas Harper
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chromium in Medicine

chromium chro·mi·um (krō'mē-əm)
n.
Symbol Cr
A lustrous hard metallic element, resistant to tarnish and corrosion and found primarily in chromite. It is used to harden steel alloys, in decorative platings, and as a pigment in glass. Atomic number 24; atomic weight 51.996; melting point 1,907°C; boiling point 2,671°C; specific gravity 7.18; valence 2, 3, 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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chromium in Science
chromium
  (krō'mē-əm)   
Symbol Cr
A hard, shiny, steel-gray metallic element that is rust-resistant and does not tarnish easily. It is used to plate other metals, to harden steel, and to make stainless steel and other alloys. Atomic number 24; atomic weight 51.996; melting point 1,890°C; boiling point 2,482°C; specific gravity 7.18; valence 2, 3, 6. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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