dubnium

[ doob-nee-uhm, duhb- ]

/ ˈdub ni əm, ˈdʌb- /

noun Chemistry, Physics.

a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Db; atomic number: 105.

Formerly un·nil·pen·ti·um

[yoo-nil-pen-tee-uhm], /ˌyu nɪlˈpɛn ti əm/, el·e·ment 105 .

Origin of dubnium

First recorded in 1990–95; named after Dubna, the town in Russia where it was first produced.

Words nearby dubnium

Dublin, Dublin Bay prawn, Dubliner, Dubliners, Dubna, dubnium, Du Bois, Dubois abscesses, DuBois, W. E. B., Dubonnet, Dubos

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for dubnium

dubnium

/ (ˈdʌbnɪəm) /

noun

a synthetic transactinide element produced in minute quantities by bombarding plutonium with high-energy neon ions. Symbol: Du; atomic no 105See hahnium

Word Origin for dubnium

C20: after Dubna, where it was first reported

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

Medical definitions for dubnium

dubnium

[ dōōb′nē-əm ]

n. Symbol Db

A radioactive synthetic element whose longest-lived isotopes have mass numbers of 258, 261, 262, and 263 with half-lives of 4.2, 1.8, 34, and 30 seconds. Atomic number 105.

Scientific definitions for dubnium

dubnium

[ dōōb′nē-əm ]

Db

A synthetic, radioactive element that is produced from californium, americium, or berkelium. Its most long-lived isotopes have mass numbers of 258, 261, 262, and 263 with half-lives of 4.2, 1.8. 34, and 30 seconds, respectively. Atomic number 105. See Periodic Table.

单词	dubnium
释义	dubnium [ doob-nee-uhm, duhb- ] / ˈdub ni əm, ˈdʌb- / noun Chemistry, Physics. a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Db; atomic number: 105. Formerly un·nil·pen·ti·um [yoo-nil-pen-tee-uhm], /ˌyu nɪlˈpɛn ti əm/, el·e·ment 105 . Origin of dubnium First recorded in 1990–95; named after Dubna, the town in Russia where it was first produced. Words nearby dubnium Dublin, Dublin Bay prawn, Dubliner, Dubliners, Dubna, dubnium, Du Bois, Dubois abscesses, DuBois, W. E. B., Dubonnet, Dubos Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for dubnium dubnium / (ˈdʌbnɪəm) / noun a synthetic transactinide element produced in minute quantities by bombarding plutonium with high-energy neon ions. Symbol: Du; atomic no 105See hahnium Word Origin for dubnium C20: after Dubna, where it was first reported 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 Medical definitions for dubnium dubnium [ dōōb′nē-əm ] n. Symbol Db A radioactive synthetic element whose longest-lived isotopes have mass numbers of 258, 261, 262, and 263 with half-lives of 4.2, 1.8, 34, and 30 seconds. Atomic number 105. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for dubnium dubnium [ dōōb′nē-əm ] Db A synthetic, radioactive element that is produced from californium, americium, or berkelium. Its most long-lived isotopes have mass numbers of 258, 261, 262, and 263 with half-lives of 4.2, 1.8. 34, and 30 seconds, respectively. Atomic number 105. See Periodic Table. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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