Periodicities
Periodicity Pe`ri*o*dic"i*ty, n.; pl. {Periodicities}. [Cf. F. p['e]riodicit['e].] The quality or state of being periodical, or regularly recurrent; as, the periodicity in the vital phenomena of plants. --Henfrey. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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