Dictionary.com Thesaurus.com

ununtrium

¹ American

[uhn-uhn-tree-uhm, oon-] / ˌʌnˈʌn tri əm, ˌun- /

noun

Chemistry. the placeholder name for element 113, subsequently named nihonium.

ununtrium ² American

[uhn-uhn-tree-uhm, oon-uhn-] / ʌnˈʌn tri əm, unˈʌn- /

noun

Chemistry. the placeholder name for element 113, subsequently named nihonium.

ununtrium Scientific

/ ə-nŭn′trē-əm /

See element 113

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.