periodical ness (periodikalnes)

state of being periodical; periodicity. [Rare.] periodicity (peri-o-dis'i-ti), n. [F. périodi cité = Pg. periodicidade; as periodic + -ity.] Periodic character; habitual tendency or disposition to recur at stated intervals of time. The flowering, once determined, appears to be subject to a law of periodicity and habit. Whewell, Bridge water Treatise, p. 22. Periodicity of an operation, in math . , the number of times it has to be repeated to give unity. lining