ununpentium

[ uhn-uh n-pen-tee-uh m ]
/ ˌʌn ənˈpɛn ti əm /

noun Chemistry, Physics.

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 Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for ununpentium

ununpentium

[ ə-nŭn′pĕntē-əm ]

Uup

See element 115.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.