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

  • n. A naturally or artificially produced radioactive isotope of an element.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a radioactive isotope of an element

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

  • n. a radioactive isotope of an element; produced either naturally or artificially


Sorry, no etymologies found.


  • The NASA probes use so-called radioisotope thermoelectric generators (RTGs) which transform heat emitted from naturally decaying plutonium into electricity.

    Reuters: Top News

  • The NASA probes use so-called radioisotope thermoelectric generators


  • Gary Bennett considers the more conventional power plants, such as radioisotope thermoelectric generators and fusion systems.

    Frontiers of Propulsion Science « dudegalea

  • While polonium-210 does have civilian applications (such as radioisotope batteries), it can theoretically be used for initiating the fission chain reactions that result in a nuclear explosion.

  • Raw data (like tree-ring thickness, radioisotope of mud layers in a lake bottom, ice core analyses, etc.) are used as a proxy for reconstruction of the temperature record for 1000 AD to 1960 AD.

    Coyote Blog » Blog Archive » Pretty Good Climategate Summary

  • Resuming production saves these missions in the future, and allows us to consider use of radioisotope power on crewed missions (although we still won't have very much).

    NASA Running Low on Pu 238 - Production to Restart - NASA Watch

  • If the radioisotope signatures from the Camp Cobra explosion are similar to those from the Iranian test in the Kavir Desert, we can conclude that the same nuclear fuel was used in both cases.

    The Omega Theory

  • “The radioisotope signature is identical to the fallout from the Iranian nuclear test.”

    The Omega Theory

  • The radioisotope signatures are as unique as fingerprints.

    The Omega Theory

  • And because the uranium in this device comes from the same stockpile as the U-235 we gave to the Iranians, the debris from the blast will have the exact same radioisotope signatures as the debris from the Kavir test.

    The Omega Theory


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  • The "ioi" is pretty disconcerting when parsing.

    October 19, 2007

  • Wow, I forgot all about this cool word!

    October 19, 2007