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ununpentium

American  
[uhn-uhn-pen-tee-uhm, oon-uhn-] / ˌʌn ʌnˈpɛn ti əm, ˌun ʌn- /

noun

  1. Chemistry. the placeholder name for element 115, subsequently named moscovium.

ununpentium Scientific  
/ ə-nŭn′pĕn′tē-əm /

  1. See element 115

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.