zeitgeber
Noun. (biology) A rhythmically occurring cue given by the environment, such as a change in light or temperature, to reset the internal body clock.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.