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

  • noun An artificially produced radioactive element with atomic number 104 that has only been produced in trace amounts. The isotope with mass number 261 has the longest confirmed half-life (65 seconds), although isotopes with longer half-lives have been reported. cross-reference: Periodic Table.

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

  • noun A transuranic chemical element (symbol Rf) with an atomic number of 104
  • noun obsolete A rejected name for seaborgium

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

  • noun a radioactive transuranic element which has been synthesized


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

[After Ernest Rutherford.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Named for Ernest Rutherford


  • Since 104 was already rutherfordium, IUPAC renamed L04 dubnium, for the Russian team that claims it discovered that element years ago.

    All In A Name

  • But in a fit of regionalism, Europeans running the International Union of Pure and Applied Chemistry named 106 rutherfordium, for the British father of the atom.

    All In A Name

  • Researchers at Lawrence Berkeley National Laboratory in California saw the isotopes of rutherfordium, seaborgium, hassium, darmstadtium, and copernicium by watching the decay of the yet-to-be-named element 114, a synthetic element first produced about a decade ago.

    Wired Top Stories

  • This virtual web server sturdiness diploidy your rutherfordium off with hot dextrose, leader, orthodontic succory, fatalistic christ, and noiselessly.

    Rational Review


Log in or sign up to get involved in the conversation. It's quick and easy.