circadian
形容词 adj.
英 /səˈkeɪ.dɪ.ən/
美 /sɚˈkeɪ.di.ən/|/sɚˈkæd.i.ən/|/ˌsɝ.kəˈdi.ən/|/ˌsɝ.kəˈdaɪ.ən/
英文释义
形容词 adj.
-
Of, relating to, or showing rhythmic behaviour with a period of approximately 24 hours; especially of a biological process.
— The circadian clock is involved in the regulation of the diurnal sleep-wake cycle, […].
词源
Etymology tree
Proto-Indo-European *(s)ker-der.
Ancient Greek κίρκος (kírkos)bor.
Latin circus
Latin circum
Latin circā
Proto-Indo-European *dyew-
Proto-Indo-European *-s
Proto-Indo-European *dyḗws
Proto-Italic *djous
Latin diēs
Proto-Indo-European *-nós
Proto-Italic *-nos
Latin -nus
Latin -ānus
Old French -ainder.
Middle English -an
English -an
English circadian
From Latin circā (“around”) + diēs (“day”) + English -an. Compare circannual.
Proto-Indo-European *(s)ker-der.
Ancient Greek κίρκος (kírkos)bor.
Latin circus
Latin circum
Latin circā
Proto-Indo-European *dyew-
Proto-Indo-European *-s
Proto-Indo-European *dyḗws
Proto-Italic *djous
Latin diēs
Proto-Indo-European *-nós
Proto-Italic *-nos
Latin -nus
Latin -ānus
Old French -ainder.
Middle English -an
English -an
English circadian
From Latin circā (“around”) + diēs (“day”) + English -an. Compare circannual.
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数据来源: Wiktionary