English

Etymology
wikipedia
From the Latin circa, meaning "around" and dies, "day", meaning literally, "around a day".

Pronunciation
audio|en-us-circadian_rhythm.ogg|Audio (US)

Noun
en-noun
#The "internal body clock" that regulates the (roughly) 24-hour cycle of biological processes in animals and plants.

Related terms
circadian

See also
infradian
ultradian

ar:circadian rhythm
id:circadian rhythm

• 2007-11-08 02:14 - DCDuring - /* Noun */

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