The circahoralian rhythm of the body follows an ultradian pattern with a period of approximately an hour.

She follows a circaseptan sleep pattern.

The circatidal rhythm of the tides is influenced by the moon.

Birds migrate circannually to find warmer climates during the winter.

Circadianity is the natural rhythm of the body that follows a 24-hour cycle.

The circalunidian cycle affects the behavior of certain animals.

She wore a beautiful Circassienne shawl.