| 单词 | circadian |
| 释义 | circadian /sûr-kāˈdi-ən/adjectiveRelating to any biological cycle (eg of varying intensity of metabolic or physiological process, or of some feature of behaviour) which is repeated, usu approx every 24 hours (esp in circadian rhythm) ORIGIN: From L circa about, di(em) day, and -an |
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