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samarium

[suh-mair-ee-uh m] /səˈmɛər i əm/
noun, Chemistry
1.
a rare-earth metallic element discovered in samarskite. Symbol: Sm; atomic weight: 150.35; atomic number: 62; specific gravity: 7.49.
Origin of samarium
1875-1880
1875-80; < New Latin; see samarskite, -ium
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for samarium

samarium

/səˈmɛərɪəm/
noun
1.
a silvery metallic element of the lanthanide series occurring chiefly in monazite and bastnaesite and used in carbon-arc lighting, as a doping agent in laser crystals, and as a neutron-absorber. Symbol: Sm; atomic no: 62; atomic wt: 150.36; valency: 2 or 3; relative density: 7.520; melting pt: 1074°C; boiling pt: 1794°C
Word Origin
C19: New Latin, from samarskite + -ium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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samarium in Medicine

samarium sa·mar·i·um (sə-mâr'ē-əm, -mār'-)
n.
Symbol Sm
A metallic rare-earth element used in ferromagnetic alloys, in infrared absorbing glass, and as a neutron absorber in certain nuclear reactors. Atomic number 62; atomic weight 150.36; melting point 1,072°C; boiling point 1,790°C; specific gravity 7.52; valence 2, 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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samarium in Science
samarium
  (sə-mâr'ē-əm)   
Symbol Sm
A silvery-white metallic element of the lanthanide series that exists in several forms and has seven naturally occurring isotopes. It is used to make glass that absorbs infrared light and to absorb neutrons in the fuel rods of nuclear reactors. Atomic number 62; atomic weight 150.36; melting point 1,072°C; boiling point 1,791°C; specific gravity approximately 7.50; valence 2, 3. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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