biological clock

Noun

 * 1)  Any of several mechanisms that regulate the periodicity of biological functions, such as the circadian rhythm.
 * 2) * 2005 US Department of Health - Your guide to healthy sleep
 * Your biological clock is actually a tiny bundle of cells in your brain that responds to light signals received through your eyes.
 * 1)  A notional clock to which people should pay attention, lest menopause or andropause kicks in and it is too late for them to have children.

Translations

 * Chinese:
 * Mandarin:
 * Danish: biologisk ur
 * Finnish: biologinen kello
 * French:, ,
 * Korean: 생물학적 시계
 * Latin: horologium biologicum
 * Luxembourgish: biologesch Auer
 * Portuguese: relógio biológico
 * Turkish: biyolojik saat


 * Chinese:
 * Mandarin:
 * Danish: biologisk ur
 * Finnish: hedelmällinen ikä
 * French:
 * Portuguese: