circannual en · ADJ
Etymology
Formed as Latin circā (“about”) + annual, after circadian.
Meanings
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(not-comparable) Of biological processes: having or occurring in annual cycles or periods
Seasonal variations in locomotor activity are generated by a circannual clock […].
2001, Joseph S. Takahashi, Fred W. Turek, Robert Y. Moore, Handbook of Behavioral Neurobiology, page 523:[…] because morbidity and mortality from cardiovascular disease also reveal statistically significant circadian and circannual rhythms.
1956, USAF School of Aerospace Medicine, Report [80-114], [1956], page 11:Light pollution can interfere with the circannual migration of birds.
Circannual rhythms control reproductive function in seasonal breeders.
2000, Martin Hume Johnson, Barry J. Everitt, Essential Reproduction, page 110: