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

  • adj. Of or belonging to the series of elements whose atomic numbers are greater than 103.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Lying beyond actinium in the periodic table; having an atomic number greater than 103.
  • n. Any of the artificially produced elements having an atomic number greater than 103.

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

  • adj. of or belonging to the elements with atomic numbers greater than 103
  • n. any of the artificially produced elements with atomic numbers greater than 103


trans- +‎ actinide (Wiktionary)


  • The Haluk Cluster was rumored to possess abundant supplies of valuable transactinide elements, which the aliens had heretofore adamantly refused to trade.

    Sagittarius Whorl

  • Compared to the genuine inferno of the Sagittarian arm of the Milky Way — nearly lifeless, seething with deadly gamma and x-radiation blasted out from the galactic hub, clogged by colossal interstellar dust clouds and minefields of cosmic debris, and infested with malignant little black holes and the weird oscillating novae that generate stable transactinide elements — dreary Phlegethon was a Garden of Eden.

    Sagittarius Whorl

  • I want to know how big a supply of transactinide elements they have out there in their cluster, and how they mine ultraheavies, given their inferior technology.

    Sagittarius Whorl

  • Last April their pirates were using it to hijack Sheltok transactinide carriers.

    Sagittarius Whorl

  • My first question: Do you have personal knowledge of pirate attacks upon Sheltok transactinide carriers traversing the Sagittarius Whorl during the past twelve months? kang:

    Sagittarius Whorl

  • Alistair did not need reminding that the Haluk Cluster had abundant resources of valuable transactinide elements, which the aliens lacked the scientific expertise to utilize, yet had perversely refused to trade to humanity.

    Perseus Spur

  • The Chemistry of the Actinide and Transactinide Elements is a contemporary and definitive compilation of chemical properties of all of the actinide elements, especially of the technologically important elements uranium and plutonium, as well as the transactinide elements.

    AvaxHome RSS:

  • When I talked to Jake Silver about the Barky Hunt Friday night, he told me about a suppressed ZP report about collaborating pirates of the same two races operating in Zone 3, hijacking transactinide carriers. "

    Sagittarius Whorl

  • "The ultraheavy transactinide elements vital to antimatter fuels and other high-energy applications are devilishly difficult to obtain.

    Sagittarius Whorl


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