The state or condition of being active or occurring during the daytime; the practice or habit of daytime activity.
Formed from 'diurnal' with the abstract noun suffix '-ation,' this technical term follows Latin-derived word-building patterns common in scientific and academic writing.
While 'diurnation' mirrors the word 'hibernation' (winter sleep), it's virtually unused in modern biology—scientists just say 'diurnal activity' instead. It's a word that could exist but never really caught on!
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