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Pronunciation varies by accent · adjective
Cyclical with a periodicity significantly shorter than 24 hours, that is, more frequent than circadian..
Ultradian rhythms […] operate in cycles of less than 24 hours, that is they happen more than once a day.
Use ultradian when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Ultradian means Cyclical with a periodicity significantly shorter than 24 hours, that is, more frequent than circadian..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Ultradian rhythms […] operate in cycles of less than 24 hours, that is they happen more than once a day.
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