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  1. critical mass

    • IPA[ˈˌkridəkəl ˈmas]

    美式

    • n.
      the minimum amount of fissile material needed to maintain a nuclear chain reaction.;the minimum size or amount of something required to start or maintain a venture
    • noun: critical mass, plural noun: critical masses

    • 釋義

    名詞

    • 1. the minimum amount of fissile material needed to maintain a nuclear chain reaction.
    • 2. the minimum size or amount of something required to start or maintain a venture a communication system is of no value unless there is a critical mass of users