zeitgeber n. a naturally occurring cue, such as light or temperature, which regulates biological rhythms; something which influences or regulates the timing or rhythm of something else. Etymological Note: zeit ‘time’ + geber ‘giver.’ Coined by Jürgen Aschoff, ca. 1954. (source: Double-Tongued Dictionary)
Further reading
A woman whose husband speaks Guaraní, Spanish, German, English, Italian, plus a bit of liturgical Hebrew, notices a curious thing happening while he was taking notes during lessons with a rabbi. As he jotted notes in Spanish and Guaraní, he used his...
A Philadelphia, Pennsylvania, listener says when he was growing up, his family used the word schmutz as a verb. For example, when one parent reminded the other to apply sunscreen to the youngsters, they might say Make sure you schmutz the kids...
what does the biological organizion mean. I need a definnion of the word?