Ultradian meaning

ŭl-trā'dē-ən
Relating to or exhibiting periodic physiological activity that occurs more than once every 24 hours.
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Relating to or exhibiting periodic physiological activity that occurs more than once every 24 hours.
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Cyclical with a periodicity significantly shorter than 24 hours, that is, more frequent than circadian.
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Origin of ultradian

  • ultra– (circa)dian
    From American Heritage Dictionary of the English Language, 5th Edition