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

  • n. An artificially produced radioactive element with atomic number 104 whose most long-lived isotopes have mass numbers of 253, 255, 257, and 259 with half-lives of 1.8, 1.6, 4.7, and 3.4 seconds, respectively. See Table at element.

from Wiktionary, Creative Commons Attribution/Share-Alike License

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

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

  • n. a radioactive transuranic element which has been synthesized


After Ernest Rutherford.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Named for Ernest Rutherford (Wiktionary)


  • 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

Wordnik is becoming a not-for-profit! Read our announcement here.


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