| 释义 | nych·them·er·on noun
 also nyc·them·er·on \ ̷ ̷ˈ ̷ ̷məˌrän\
 (plural nychthem·era \-m(ə)rə\ ; or nychthemerons)
 Etymology: Greek nychthēmeron, from nykt-, nyx night + -hēmeron (from hēmera day) — more at night, hemera
 : a full period of a night and a day
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