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ununnilium

[uhn-uh-nil-ee-uh m] /ˌʌn əˈnɪl i əm/
noun, Chemistry, Physics.
1.
former name of darmstadtium. Symbol: Uun.
Also called element 110.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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ununnilium in Science
ununnilium
  (ə-nə-nĭl'ē-əm)   
The temporary name given to chemical element 110. This element has now been officially named darmstadtium. The symbol for ununnilium was Uun.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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