infradian

English

Etymology

Uncertain. Possibly from the Latin infra (“below”) and diēs (“a day”) with the English suffix -an. Compare circadian, ultradian, and infra etc.

Adjective

infradian (not comparable)

  1. Cyclical with a periodicity significantly longer than 24 hours, that is, less frequent than circadian.

Usage notes

The comparative "more infradian" is not used, in contrast to the comparative "more ultradian".

See also

Anagrams
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