meitnerium
noun
meit·ner·i·um
mīt-ˈnir-ē-əm 
-ˈner-
: a short-lived radioactive element produced artificially see Chemical Elements Table
Examples of meitnerium in a Sentence
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Known as a transition metal, meitnerium was named after scientist Lise Meitner who played a pivotal role in understanding and explaining nuclear fission/splitting of the atom.
—
Allison Futterman, Discover Magazine, 17 Sep. 2022
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Allison Futterman, Discover Magazine, 17 Sep. 2022
Cite this Entry
“Meitnerium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/meitnerium. Accessed 18 Jul. 2025.
Copy CitationKids Definition
meitnerium
noun
meit·ner·i·um
mīt-ˈnir-ē-əm
-ˈner-
: a short-lived radioactive element produced artificially see element
Medical Definition
meitnerium
noun
meit·ner·i·um
mīt-ˈnir-ē-əm, -ˈner-
: a short-lived radioactive element that is artificially produced
—symbol Mt
see Chemical Elements Table
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