diurnal

Adjective
  1. Of or belonging to or active during the day (synset 300681933)
    "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"; "diurnal and nocturnal offices"
    referred to in: biological science, biology - the science that studies living organisms
  2. Having a daily cycle or occurring every day (synset 301975098)
    "diurnal rotation of the heavens"
    similar to: periodic, periodical - happening or recurring at regular intervals

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