A zeitgeber ( (T)SYTE-gay-bər, ZYTE-, German: [ˈtsaɪtˌɡeːbɐ]) is any external or environmental cue that entrains or synchronizes an organism's biological rhythms, usually naturally occurring and serving to entrain to the Earth's 24-hour light/dark and 12-month cycles. == History == The term Zeitgeber (lit. 'time giver') was first used by Jürgen Aschoff, one of the founders of the field of chronobiology.
A zeitgeber ( (T)SYTE-gay-bər, ZYTE-, German: [ˈtsaɪtˌɡeːbɐ]) is any external or environmental cue that entrains or synchronizes an organism's biological rhythms, usually naturally occurring and serving to entrain to the Earth's 24-hour light/dark and 12-month cycles. == History == The term Zeitgeber (lit. 'time giver') was first used by Jürgen Aschoff, one of the founders of the field of chronobiology.
Source: Wikipedia "Zeitgeber" · CC BY-SA 4.0
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