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1. Oxford American Dictionary

   periodicity

   • IPA[ˌperēəˈdisədē]

   美式

   • n.
     the quality or character of being periodic; the tendency to recur at intervals

   • noun: periodicity

2. • 釋義

   n.

   名詞

   • 1. technical the quality or character of being periodic; the tendency to recur at intervals the periodicity of the sunspot cycle
3. • 更多解釋

   periodicity

   • IPA[ˌpɪərɪəˈdɪsɪti]

   英式

   • n.
     the quality or character of being periodic; the tendency to recur at intervals: the periodicity of the sunspot cycle

   Oxford Dictionary