Annual

(redirected from circannual)
Also found in: Dictionary, Thesaurus, Medical, Encyclopedia.
Related to circannual: circannual rhythm

Annual

Describing a situation, event, or statement that occurs or is filed only once per year. See also: Annual Report.
References in periodicals archive ?
Circannual vitamin d serum levels and disease activity in rheumatoid arthritis: Northern versus Southern Europe.
How do photoperiod, the pineal, melatonin and circannual rhythms interact to coordinate seasonal reproduction in salmonid fish?
This survey edited by Kulczyckowska (genetics and marine biotechnology, Polish Academy of Sciences) examines the current state of knowledge and research into the circadian and circannual biological rhythms in fish.