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Periodicity

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Definition: The tendency of a phenomenon to recur at regular intervals; in biological systems, the recurrence of certain activities (including hormonal, cellular, neural) may be annual, seasonal, monthly, daily, or more frequently (ultradian).  IM + coord with specific dis for periodically occurring dis (IM); no qualif; do not confuse with PERIODIC DISEASE, a specific clin entity: see Dorland   
See Also Biological Clocks; Circadian Rhythm
Examples Seasons 		Other names Rhythmicity; Cyclicity; Biorhythms; Bioperiodicity; Rhythmicities; Periodicities; Cyclicities; Biorhythm; Bioperiodicities

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Sources: NLM Medical Subject Headings, NIH UMLS, Drugs@FDA, FDA AERS original data copyright United States Government. No endorsement implied. Last modified 6/6/2012
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