Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An artificially produced radioactive element with atomic number 105. The isotope with mass number 262 has the longest confirmed half-life (35 seconds), although longer half-lifes have been reported for some of its heavier isotopes. cross-reference: Periodic Table.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A transuranic chemical element (symbol Db) with atomic number 105.
  • noun chemistry, obsolete A rejected name for rutherfordium.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a transuranic element

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[After Dubna, Russia, location of the United Institute of Nuclear Research.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Named after Dubna in Russia.

Examples

Comments

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  • Db.

    December 16, 2007