Periodicity
Pronunciation : Pe`ri*o*dic"i*ty
Part of Speech : n.;
Etymology : [Cf. F. p?riodicit?.]
Definition : Defn: The quality or state of being periodical, or regularly recurrent; as, the periodicity in the vital phenomena of plants. Henfrey.
pl. Periodicities.
Source : Webster's Unabridged Dictionary, 1913