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Word of the Day
Monday, June 20, 2016

Definitions for zeitgeber

  1. an environmental cue, as the length of daylight or the degree of temperature, that helps to regulate the cycles of an organism's biological clock.

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Citations for zeitgeber
In nearly every land animal, light is the major Zeitgeber ("time giver"), with temperature a distant second. Richard Restak, The Brain, 1984
Certainly the sun plays an important role in "setting" the circadian clock by acting as a "zeitgeber" or time giver, but how often do we consider the moon? , "We may all be lunatics!" New Scientist, June 12, 1975
Origin of zeitgeber
1970-1975
Zeitgeber is of German origin, translating literally as "time giver." It entered English in the 1960s.
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