Definitions

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

  • adj. Possible to split.
  • adj. Physics Fissionable, especially by neutrons of all energies.
  • adj. Geology Easily split along close parallel planes.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Able to be split
  • adj. Easily split along a grain
  • adj. Capable of undergoing nuclear fission

from the GNU version of the Collaborative International Dictionary of English

  • adj. Capable of being split, cleft, or divided in the direction of the grain, like wood, or along natural planes of cleavage, like crystals.
  • adj. Fissionable.

from The Century Dictionary and Cyclopedia

  • Capable of being split, cleft, or divided into layers, as wood in the direction of the grain, or certain minerals and rocks in the planes of cleavage or foliation. See schist and cleavage.
  • In entomology, formed of plates or scales which are closely appressed in repose, but may be spread apart: an epithet sometimes applied to lamellate antennæ.

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

  • adj. capable of being split or cleft or divided in the direction of the grain
  • adj. capable of undergoing nuclear fission

Etymologies

Latin fissilis, from fissus, split; see fissi-.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

  • Furthermore, to judge from the reports that have been written about a global black market in fissile materials, perhaps you could sit on the periphery — say in Istanbul — and with relatively little risk allow the uranium to come to you.

    How to Get a Nuclear Bomb

  • And, Paula, this is a much, much, much greater threat than any threat from an ICBM missile and there's an awful lot of this what they call, the scientists call fissile material, the material that makes a nuclear explosion.

    CNN Transcript Mar 6, 2002

  • What intelligence analysts think is more likely is what's called fissile or a dirty bomb, which would using radioactive material that would not create a nuclear explosion, but there would be a explosion that would spread radioactivity over an area and make it uninhabitable for several years.

    CNN Transcript Nov 15, 2001

  • The term 'nuclear materials' (also known as fissile materials) refers to the substances which, by undergoing rapid nuclear fission, provide the explosive energy of nuclear weapons.

    The Hindu - Front Page

  • In May 2009 the United Nations 'Conference on Disarmament agreed to hold talks on an international treaty to ban the production of fissile materials for nuclear weapons, generally referred to as a fissile material cutoff treaty.

    Scientific American

  • In addition to HEU and plutonium, neptunium-237, americium-241, americium-243, and any other fissionable isotope suitable for the manufacture of nuclear weapons are classified as fissile materials in the IPFM draft treaty.

    Arms Control Association - The authoritative source on arms control since 1971.

  • The world has a huge surplus of the exotic, manmade heavy metals known as fissile materials, whose chain-reacting atoms have been the core of nuclear bombs since Hiroshima and Nagasaki.

    SouthCoastToday.com Latest Headlines

  • A so-called fissile cut-off agreement is widely regarded as the next achievable step towards ending the threat of nuclear war and a recent breakthrough had appeared to clear the way for negotiations to begin in the next few months.

    The Times of India

  • Only 0.7% of natural uranium is "fissile", or capable of undergoing fission in a normal reactor.

    Nuclear fuel cycle

  • If the spallation target is surrounded by a blanket assembly of nuclear fuel, such as fissile isotopes of uranium or plutonium (or thorium capable of breeding uranium-233), there is a possibility of sustaining a fission reaction.

    Accelerator-driven nuclear energy

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  • the fissile logic of the bildungsroman...

    October 14, 2007