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lutecium

[loo-tee-shee-uh m] /luˈti ʃi əm/
noun, Chemistry
1.

lutetium

or lutecium

[loo-tee-shee-uh m] /luˈti ʃi əm/
noun, Chemistry
1.
a trivalent rare-earth element. Symbol: Lu; atomic weight: 174.97; atomic number: 71.
Origin of lutetium
1905-1910
1905-10; < Latin Lūtēt(ia) Paris + -ium
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for lutecium

lutetium

/lʊˈtiːʃɪəm/
noun
1.
a silvery-white metallic element of the lanthanide series, occurring in monazite and used as a catalyst in cracking, alkylation, and polymerization. Symbol: Lu; atomic no: 71; atomic wt: 174.967; valency: 3; relative density: 9.841; melting pt: 1663°C; boiling pt: 3402°C
Word Origin
C19: New Latin, from Latin Lūtētia ancient name of Paris, home of G. Urbain (1872–1938), French chemist, who discovered it
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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lutecium in Medicine

lutetium lu·te·ti·um or lu·te·ci·um (lōō-tē'shē-əm)
n.
Symbol Lu
A rare-earth element, used in nuclear research. Atomic number 71; atomic weight 174.97; melting point 1,663°C; boiling point 3,393°C; specific gravity 9.841 (at 25°C); valence 3.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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lutecium in Science
lutetium
  (l-tē'shē-əm)   
Symbol Lu
A silvery-white metallic element of the lanthanide series that is used in nuclear technology. Its radioactive isotope is used in determining the age of meteorites. Atomic number 71; atomic weight 174.97; melting point 1,663°C; boiling point 3,395°C; specific gravity 9.840 (at 25°C); valence 3. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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