circadian
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English
[edit]Etymology
[edit]From the Latin circā (“about”) and diēs (“a day”) with the English suffix -an. Compare circannual.
Pronunciation
[edit]- (UK) IPA(key): /səˈkeɪ.dɪ.ən/
Audio (Southern England): (file) - (US) IPA(key): /sɚˈkeɪ.di.ən/, /sɚˈkæd.i.ən/, /ˌsɝ.kəˈdi.ən/, /ˌsɝ.kəˈdaɪ.ən/
Adjective
[edit]circadian (not comparable)
- (biology) Of, relating to, or showing rhythmic behaviour with a period of 24 hours; especially of a biological process.
- 2000, Arnold Sameroff, et al: Handbook of Developmental Psychopathology, page 310:
- The circadian clock is involved in the regulation of the diurnal sleep-wake cycle, […].
- 2002, Jill B. Becker, Behavioral Endocrinology, page 483:
- To summarize, the circadian system, particularly the SCN, controls the circadian pattern of melatonin release in mammals.
- 2005, Paul Martin, Counting Sheep: The Science and Pleasures of Sleep and Dreams, page 114:
- The most obvious circadian rhythm is the daily cycle of sleep and activity.
- 2014 April 5, “Quite interesting: A quietly intriguing column from the brains behind QI, the BBC quiz show. This week; QI orchids you not”, in The Daily Telegraph (Weekend), page W22:
- Circadian clocks developed early in evolution in single-celled organisms, before the animal and plant kingdom split from one another. The original clocks probably functioned to protect the cells from damage induced by high UV radiation.
Synonyms
[edit]Coordinate terms
[edit]Derived terms
[edit]Related terms
[edit]Translations
[edit]relating to rhythmic behavior with a period of 24 hours
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Anagrams
[edit]Romanian
[edit]Etymology
[edit]Borrowed from French circadien.
Adjective
[edit]circadian m or n (feminine singular circadiană, masculine plural circadieni, feminine and neuter plural circadiene)
Declension
[edit]Declension of circadian
singular | plural | ||||||
---|---|---|---|---|---|---|---|
masculine | neuter | feminine | masculine | neuter | feminine | ||
nominative/ accusative |
indefinite | circadian | circadiană | circadieni | circadiene | ||
definite | circadianul | circadiana | circadienii | circadienele | |||
genitive/ dative |
indefinite | circadian | circadiene | circadieni | circadiene | ||
definite | circadianului | circadienei | circadienilor | circadienelor |
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- English 4-syllable words
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- Romanian terms borrowed from French
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