circannual

[sur-kan-yoo-uhl]

adjective

Biology.

1. noting or pertaining to a biological activity or cycle that recurs yearly.

Word History and Origins

Origin of circannual¹

First recorded in 1970–75; circ(a) + annual

Example Sentences

This annual clock is known as the circannual rhythm and is the longer-term cousin of the circadian or daily rhythm which keeps us awake at the right time of day.

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Thus, entire lines of research were reduced or have essentially stopped - tidal, lunar and circannual rhythms, Sun-compass orientation, photoperiodism, development, ecology and evolution - waiting for new techniques and new findings that will enable them to re-start.

Read more on Scientific American