diurnal

• Qui se rapporte au jour ou qui se produit pendant la journée; actif pendant le jour (par opposition à nocturne).

Relating to or occurring during the day; active in the daytime.

1. Active during the dayC1formalscientific

   Describing animals or plants that are active or function primarily during the daytime.

   diurne (actif le jour)

   • Most birds are diurnal, hunting and feeding during daylight hours.
   • Diurnal animals have adapted to the sun's cycle for survival.
   • The diurnal habits of the species make it easier to observe in the wild.

   Synonymesdaytime

   Antonymesnocturnal

2. Daily cycleC1formalscientific

   Relating to or occurring in a day; each day.

   Quotidien, journalier (cycle d'un jour)

   • The diurnal rotation of the Earth causes day and night.
   • Diurnal temperature variations are more extreme in deserts.
   • The study focused on diurnal patterns of human activity.

   Synonymesdailyeverydayquotidian