Definition of infradian in English:

infradian

adjectiveɪnˈfreɪdɪəninˈfrādēən

Physiology

(of a rhythm or cycle) having a period of recurrence longer than a day; occurring less than once a day.
〔生理〕（节律，周期）亚日的。比较ULTRADIAN
Compare with ultradian
Example sentencesExamples
- The crayfish Procambarus clarkii is a nocturnal organism that displays a span of overt circadian and infradian rhythms to adapt to daily and seasonal environmental lighting changes.
- In this paper, a presumptive role for infradian hormonal rhythms is considered.
- The circadian rhythm resides with an infradian rhythm of lunar 28-day cycles, seasonal cycles of cold and hot as well as shifting light and dark.
- Circadian and circannual rhythms of sex steroids in men have been well described, but infradian dynamics of estradiol and progesterone in men are unknown.

Origin

1960s: from infra- ‘below’ (i.e. expressing a lower frequency), on the pattern of circadian.

Definition of infradian in US English:

infradian

adjectiveinˈfrādēən

Physiology

(of a rhythm or cycle) having a period of recurrence longer than a day; occurring less than once a day.
〔生理〕（节律，周期）亚日的。比较ULTRADIAN
Compare with ultradian
Example sentencesExamples
- The circadian rhythm resides with an infradian rhythm of lunar 28-day cycles, seasonal cycles of cold and hot as well as shifting light and dark.
- The crayfish Procambarus clarkii is a nocturnal organism that displays a span of overt circadian and infradian rhythms to adapt to daily and seasonal environmental lighting changes.
- In this paper, a presumptive role for infradian hormonal rhythms is considered.
- Circadian and circannual rhythms of sex steroids in men have been well described, but infradian dynamics of estradiol and progesterone in men are unknown.

Origin

1960s: from infra- ‘below’ (i.e. expressing a lower frequency), on the pattern of circadian.

词汇	infradian
释义	Definition of infradian in English: infradian adjectiveɪnˈfreɪdɪəninˈfrādēən Physiology (of a rhythm or cycle) having a period of recurrence longer than a day; occurring less than once a day. 〔生理〕（节律，周期）亚日的。比较ULTRADIAN Compare with ultradian Example sentencesExamples The crayfish Procambarus clarkii is a nocturnal organism that displays a span of overt circadian and infradian rhythms to adapt to daily and seasonal environmental lighting changes. In this paper, a presumptive role for infradian hormonal rhythms is considered. The circadian rhythm resides with an infradian rhythm of lunar 28-day cycles, seasonal cycles of cold and hot as well as shifting light and dark. Circadian and circannual rhythms of sex steroids in men have been well described, but infradian dynamics of estradiol and progesterone in men are unknown. Origin 1960s: from infra- ‘below’ (i.e. expressing a lower frequency), on the pattern of circadian. Definition of infradian in US English: infradian adjectiveinˈfrādēən Physiology (of a rhythm or cycle) having a period of recurrence longer than a day; occurring less than once a day. 〔生理〕（节律，周期）亚日的。比较ULTRADIAN Compare with ultradian Example sentencesExamples The circadian rhythm resides with an infradian rhythm of lunar 28-day cycles, seasonal cycles of cold and hot as well as shifting light and dark. The crayfish Procambarus clarkii is a nocturnal organism that displays a span of overt circadian and infradian rhythms to adapt to daily and seasonal environmental lighting changes. In this paper, a presumptive role for infradian hormonal rhythms is considered. Circadian and circannual rhythms of sex steroids in men have been well described, but infradian dynamics of estradiol and progesterone in men are unknown. Origin 1960s: from infra- ‘below’ (i.e. expressing a lower frequency), on the pattern of circadian.
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