Share this entry

Share this page

infradian

Line breaks: in|fra|dian
Pronunciation: /ɪnˈfreɪdɪən
 
/

Definition of infradian in English:

adjective

Physiology
(Of a rhythm or cycle) having a period of recurrence longer than a day; occurring less than once a day. Compare with ultradian.
Example sentences
  • 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.
  • 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.
  • In this paper, a presumptive role for infradian hormonal rhythms is considered.

Origin

mid 20th century: from infra- 'below' (i.e. expressing a lower frequency), on the pattern of circadian.

Definition of infradian in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day jaunt
Pronunciation: jônt
noun
a short excursion or journey for pleasure