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element 115

noun, Chemistry, Physics.

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.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Contemporary definitions for element-115
noun

an unconfirmed synthetic superheavy chemical element with atomic number 115

Word Origin

2004

Dictionary.com's 21st Century Lexicon
Copyright © 2003-2014 Dictionary.com, LLC
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element-115 in Science
element 115  
Symbol Uup
An artificially produced radioactive element whose isotopes have mass numbers of 287 and 288 and half-lives of less than one second. Atomic number 115. Also called ununpentium. See Periodic Table.
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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