circannual

adj

circannual

adj

Etymology Formed as Latin circā (“about”) + annual, after circadian.

1

Biology, Natural sciences Of biological processes: having or occurring in annual cycles or periods

Light pollution can interfere with the circannual migration of birds.
[…] 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:

2 more examples

Circannual rhythms control reproductive function in seasonal breeders.2000, Martin Hume Johnson, Barry J. Everitt, Essential Reproduction, page 110:
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:

Derived terms: circannually

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.