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

  • n. An artificially produced radioactive element with atomic number 106 whose most long-lived isotopes have mass numbers 259, 261, 263, 265, and 266 with half-lives of 0.9, 0.23, 0.8, 16, and 20 seconds, respectively. Also called unnilhexium. See Table at element.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A transuranic chemical element (symbol Sg) with atomic number 106

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

  • n. a transuranic element


After Glenn Theodore Seaborg.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Named for Glenn T. Seaborg. (Wiktionary)


  • Shortly after the official 1997 recognition of the name seaborgium for element 106, Jeffrey Winters, writing in the January 1998 issue of Discover Magazine, made the following observation:

    MAKE Magazine

  • HEN BERKELEY CHEMISTS discovered element 106 and named it seaborgium for their colleague Glenn Seaborg, the nuclear physicist elated.

    All In A Name

  • The Lawrence Berkeley Laboratory has produced a dozen superheavy elements called transuranics and bear such names as berkelium, californium, lawrencium and seaborgium.

    SFGate: Top News Stories

  • 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


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