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unununium

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u⋅nu⋅nun⋅i⋅um

[uh-nuh-nuhn-ee-uhm]
–noun Chemistry.
former name of roentgenium. Symbol: Uuu
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Science Dictionary
unununium   (ə-nə-nŭn'ē-əm)  Pronunciation Key 
See element 111.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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