TSYT'ge'buhr - n. [Ger: time-giver, on the model of Taktgeber an electronic synchronization device]

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.

"Through careful diet regulation and elimination of all zeitgeber, Lavrik slowly ceased to be human." - Mavril

from A Word A Day

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