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
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
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012