ultradian /ul·tra·di·an/ (ul-trah´de-an) pertaining to a period of less than 24 hours; applied to the rhythmic repetition of certain phenomena in living organisms occurring in cycles of less than a day (ultradian rhythm) .
ultradian
ul·tra·di·an ( l-tr  d - n)adj. Relating to or exhibiting periodic physiological activity that occurs more than once every 24 hours. |
ultradian
[-rā′dē·ən]
Etymology: L, ultra + dies, day
pertaining to a biorhythm that occurs in cycles of less than 24 hours.
ultradian
pertaining to a period of less than 24 hours; applied to the rhythmic repetition of certain phenomena in living organisms occurring in cycles of less than a day (ultradian rhythm).
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