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See also: Zeitgeber
zeitgeber (plural zeitgebers or zeitgeber)
- (physiology) A rhythmically occurring cue given by the environment, such as a change in light or temperature, to reset the internal body clock. [from 20th c.]
- 2017, Matthew Walker, Why We Sleep, Penguin, published 2018, page 18:
- Thus, while light is the most reliable and thus the primary zeitgeber, there are many factors that can be used in addition to, or in the absence of, daylight.