| 单词 | light–dark |
| 释义 | > as lemmaslight–dark light–dark adj. of, relating to, or designating alternating periods of light and darkness, esp. the natural daily alternation of light and darkness, which drives circadian rhythms in living organisms. ΚΠ 1935 G. W. Goldsmith & A. L. Hafenrichter Anthokinetics ii. 43 After 24 hours exposure to abnormal light-dark periods, the periodic movements are disturbed and weakened. 1984 D. Parker & J. Parker New Compleat Astrologer 56/1 The simplest example of this ‘photic’ control of biological rhythms is one we have already mentioned—the light dark sequence which controls our feeling of wakefulness. 2020 Oceanography 33 6/2 In mammals, melanopsin plays an important role in synchronizing circadian rhythms with the daily light-dark cycle. < as lemmas |
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