critical mass definition

  • noun:
    • The smallest size of a fissionable material that may sustain a nuclear sequence effect at a continuing level.
    • The amount of matter necessary to generate adequate gravitational power to prevent the present development of this universe.
    • An amount or degree needed for a specific result or brand-new action to happen: "The abrupt national uproar over medications and drug abuse has reached politically crucial mass in Washingtonā€¯ ( Tom Morganthau).
    • the quantity of fissile product which needed to support a self-sustaining nuclear chain effect
    • A quantity or amount expected to trigger a phenomenon.
    • the minimal size of fissionable product that will maintain a chain reaction
    • the minimum quantity (of some thing) needed to start or keep a venture

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