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unnilseptium

[yoo-nil-sep-tee-uh m] /ˌyu nɪlˈsɛp ti əm/
noun, Chemistry, Physics.
1.
former name of bohrium. Symbol: Uns.
Also called element 107.
Origin of unnilseptium
< Latin ūn(us) one + nīl nothing + sept(em) seven + New Latin -ium -ium

bohrium

[bawr-ee-uh m, bohr-] /ˈbɔr i əm, ˈboʊr-/
noun, Chemistry, Physics.
1.
a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Bh; atomic number: 107.
Formerly unnilseptium, element 107.
Origin
named after Danish physicist Niels Bohr; see -ium

element 107

noun, Chemistry, Physics.
1.
Formerly unnilseptium.
Origin
1975-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for unnilseptium

bohrium

/ˈbɔːrɪəm/
noun
1.
a transuranic element artificially produced in minute quantities by bombarding 204Bi atoms with 54Cr nuclei. Symbol: Bh; atomic no: 107 Former names element 107, unnilseptium
Word Origin
C20: after Neils Bohr
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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unnilseptium in Science
bohrium
  (bôr'ē-əm)   
Symbol Bh
A synthetic, radioactive element that is produced by bombarding bismuth with chromium ions. Its most long-lived isotopes have mass numbers of 261, 262, and 264 with half-lives of 11.8 milliseconds, 0.1 second, and 0.44 second, respectively. Atomic number 107. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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