infradian

[ in-frey-dee-uhn ]

adjectivePhysiology.
  1. of or relating to a biorhythm or regular biological cycle having a period of more than 24 hours, such as the migration of birds or the human menstrual cycle.: Compare circadian, ultradian.

Origin of infradian

1
First recorded in 1965–70; infra- + Latin di(ēs) “day” + -an

Words Nearby infradian

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024