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meitnerium

[ mahyt-nur-ee-uhm ]

noun

, Chemistry, Physics.
  1. a superheavy, synthetic, radioactive element with a very short half-life. : Mt; : 109.


meitnerium

/ ˈmaɪtnɪərɪəm /

noun

  1. a synthetic element produced in small quantities by high-energy ion bombardment. Symbol: Mt; atomic no: 109
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


meitnerium

/ mīt-nûrē-əm /

  1. A synthetic, radioactive element that is produced by bombarding bismuth with iron ions. Its most long-lived isotopes have mass numbers of 266 and 268 with half-lives of 3.4 milliseconds and 70 milliseconds, respectively. Atomic number 109.


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Word History and Origins

Origin of meitnerium1

First recorded in 1975–80; officially assigned to element 109 in 1997; named after Austrian physicist Lise Meitner; -ium ( def )
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Word History and Origins

Origin of meitnerium1

C20: named after Lise Meitner
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Example Sentences

She is the namesake of meitnerium, element 109.

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MeitnerMéjico