[ dis-proh-see-uh m, -shee- ]
/ dɪsˈproʊ si əm, -ʃi- /
a rare-earth metallic element, highly reactive and paramagnetic, found in small amounts in various rare-earth minerals, as euxenite and monazite: used to absorb neutrons in nuclear reactors. Symbol: Dy; atomic weight: 162.50; atomic number: 66.
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British Dictionary definitions for dysprosium
/ (dɪsˈprəʊsɪəm) /
a soft silvery-white metallic element of the lanthanide series: used in laser materials and as a neutron absorber in nuclear control rods. Symbol: Dy; atomic no: 66; atomic wt: 162.50; valency: 3; relative density: 8.551; melting pt: 1412°C; boiling pt: 2567°C
Word Origin for dysprosium
C20: New Latin, from Greek dusprositos difficult to get near + -ium
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
Medicine definitions for dysprosium
[ dĭs-prō′zē-əm, -zhē-əm ]
n. Symbol Dy
A soft, silvery rare-earth element used in nuclear research. Atomic number 66.
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Science definitions for dysprosium
[ dĭs-prō′zē-əm ]
A soft, silvery metallic element of the lanthanide series. Because it has a high melting point and absorbs neutrons well, dysprosium is used to help control nuclear reactions. Atomic number 66; atomic weight 162.50; melting point 1,407°C; boiling point 2,600°C; specific gravity 8.536; valence 3. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.