infradian
Cyclical with a periodicity significantly longer than 24 hours, that is, less frequent…Cyclical with a periodicity significantly longer than 24 hours, that is, less frequent than circadian.
Meaning
1 senses(not comparable)Cyclical with a periodicity significantly longer than 24 hours, that is, less frequent than circadian.
Origin
Uncertain. Possibly from the Latin infra (“below”) and diēs (“a day”) with the English sufUncertain. Possibly from the Latin infra (“below”) and diēs (“a day”) with the English suffix -an. Compare circadian, ultradian, and infra etc.
Wiktionary, CC BY-SA 4.0 · source