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Definition of Ultradian
1. Adjective. Cyclical with a periodicity significantly shorter than 24 hours, that is, more frequent than circadian. ¹
¹ Source: wiktionary.com
Medical Definition of Ultradian
1. Relating to biologic variations or rhythms occurring in cycles more frequent than every 24 hours. Compare: circadian, infradian. Origin: ultra-+ L. Dies, day (05 Mar 2000)
Lexicographical Neighbors of Ultradian
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