Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


 (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 ?
Administration of Cd and Hg were performed between zeitgeber time (ZT; ZT 0 corresponds to lights on and ZT 12 corresponds to lights off in a 12 hr light:dark cycle) 4 and ZT5.
El ciclo de luz y oscuridad generado por la rotacion de la Tierra es el sincronizador, o Zeitgeber (termino aleman que significa "dador de tiempo") mas prevalente (1).
Zeitgeber is German for "time giver," and examples include light, temperature, noise, exercise, and feeding regimens.
The main synchronizing agent or zeitgeber for the central nervous system is light transmitted directly from the retina via the retinohypothalamic tract.
1974) Reentrainment of circadian rhythms after phase-shifts of the zeitgeber.
In other cases, the timing of the activity is determined endogenously by an internal biological clock, which itself was previously set by a zeitgeber (an external oscillating environmental factor that entrains a biological rhythm) (Bunning 1967; Danks 2006; Kostal 2011; Saunders & Bertossa 2011).
Immunoblotting analysis of liver lysates demonstrated that phosphorylation of ERK1 /2 shows diurnal variations, peaking at zeitgeber time (ZT) 6 (light-on at ZT0 and light-off at ZT12) (Fig.
La menor cantidad de horas de luz, diariamente, es lo que actua como el zeitgeber para dicho insecto.