zeitgeber

“They are known as the zeitgeber, a German word meaning time keeper.”

You Scratch Your Nose, I Scratch Mine - What body language really means.

“People talk a lot about circadian (circa dia = approximately one day) rhythms and establishing a regular sleep schedule, but bedtime timing is just one "zeitgeber" (lit: time giver), or stimulus that synchronizes this biorhythm (like pheromones and menstrual cycle).”

Tim Ferriss: Relax Like a Pro: 5 Steps to Hacking Your Sleep

“For people and animals, light is the most important zeitgeber.”

Simon & Schuster: The Time Paradox

“By paying attention to who changes their posture or gestures in a particular way first - and then watching who mirrors it, you can determine who acts as the zeitgeber.”

You Scratch Your Nose, I Scratch Mine - What body language really means.

“An observant person can gather useful information, especially when first getting to know a group of people, simply by paying attention to who acts as the zeitgeber during conversations.”

You Scratch Your Nose, I Scratch Mine - What body language really means.

“Occupying the zeitgeber position is not so much a personality trait as it is highly situationally dependent.”

You Scratch Your Nose, I Scratch Mine - What body language really means.

“But a zeitgeber could also be a scrambled-egg breakfast or children coming home from school in the afternoon.”

NYT > Home Page

“V dorsomedial terminals at zeitgeber time (ZT) 2 and ZT6, in comparison to the night at ZT14 and ZT18 (”

PLoS Biology: New Articles