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 (tsīt′gĕb′ər, zīt′-)
An external stimulus or cue, such as daylight or a regularly repeated occurrence, that serves to regulate an organism's biological clock.

[German Zeitgeber : Zeit, time; see Zeitgeist + Geber, giver (from geben, to give, from Middle High German, from Old High German geban; see ghabh- in Indo-European roots).]


(Biology) biology an agent or event, such as light or the tide, that triggers the biological clock of organisms


(ˈtsaɪtˌgeɪ bər)
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.
[1970–75; < German (1954), literally, time-giver]
References in periodicals archive ?
Rouleau N, Dotta BT (2014) Electromagnetic fields as structure-function zeitgebers in biological systems: Environmental orchestrations of morphogenesis and consciousness.
These shallow periods may enhance the ability of fish to use sunrise and sunset as zeitgebers to entrain a circadian clock (Aschoff, 1965; Takahashi and Zatz, 1982; Neilson and Perry, 1990) or may represent optimal times for feeding on shallow-water prey, such as flying fish, a main portion of the diet of dolphinfish (Olson and Galvan-Magana, 2002).
Influence of chronotype and social zeitgebers on sleep/wake patterns.
Aunque con mucha menor intensidad que la luz, otros Zeitgebers en humanos son los aspectos socioculturales del entorno, como los horarios de alimentacion y los momentos de mayor actividad, entre otros (1).
Because poor sleep can impair quality of life, decrease the progression of the recovery process, and increase one's risk for other diseases, (8,9) patients in the POWER program learn the physiology of sleep, including the management of circadian rhythms, social and biological zeitgebers, and the connection between sleep and memory.
The rhythm is entrained by external cues known as zeitgebers.
18: By the time you notice all of the following zeitgebers (a German word for time keeper or marker), Early Winter could well be here: Budding Christmas Cacti, the opening of climbing bittersweet, juncos at the bird feeder, the fall of the last maple and the burning bush leaves, a killing frost on your tomatoes, poinsettias in the supermarket, sparrow hawks on the high wires, scouting the fields for prey.
The study of gender and age differences on M/E in different cultural contexts would contribute to improve the knowledge about these discrepancies, given that it remains poorly understood how biological, cultural, and environmental zeitgebers act together to determine individual differences on M/E (Schmidt & Randler, 2010).
b) travel causes changes in environmental cues known as zeitgebers
This brain region controls the internal circadian pacemaker, which is synchronized to the hour of the day by both external zeitgebers (time givers, or cues) and internal cues.
El reloj es sincronizado a los eventos ambientales a traves de senales luminosas y senales no luminosas que actuan como claves temporales o Zeitgebers (del aleman Zeit, tiempo; geber, dador).
1988, Social zeitgebers and biological rhythms, Archives of General Psychiatry, 45, 948-952.