[ 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


[ ə-nŭn′pĕntē-əm ]


See element 115.

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