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zeit•ge•ber



Pronunciation: (tsīt'gā"bur), [key]
n.
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.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

ZeistZeitgeist

 

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