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ununpentium

[uhn-uh n-pen-tee-uh m] /ˌʌn ənˈpɛn ti əm/
noun, Chemistry, Physics.
1.
a superheavy, synthetic, radioactive element with a short half-life. Symbol: Uup; atomic number: 115.
Also called element 115.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Contemporary definitions for ununpentium
noun

an unconfirmed synthetic superheavy chemical element with atomic number 115

Word Origin

2004

Dictionary.com's 21st Century Lexicon
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ununpentium in Science
ununpentium
  (ə-nŭn'pěn'tē-əm)   
See element 115.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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