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element 115

American  
[el-uh-muhnt wuhn fif-teen] / ˈɛl ə mənt ˈwʌn ˌfɪfˈtin /

noun

  1. Chemistry. moscovium.

element 115 Scientific  

  1. An artificially produced radioactive element whose most stable confirmed isotopes have mass numbers of 287 and 288 and half-lives of less than one second.

  2. Also called ununpentium

  3. See Periodic Table

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.