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[ US /nɑkˈtɝnəɫ/ ]
[ UK /nɒktˈɜːnə‍l/ ]
ADJECTIVE
  1. of or relating to or occurring in the night
    nocturnal darkness
  2. belonging to or active during the night
    nocturnal animals are active at night
    nocturnal plants have flowers that open at night and close by day

How To Use nocturnal In A Sentence

  • Most nocturnal grazing animals such as deer close their pupil as a horizontal shutter.
  • I'm starting to slip back into my nocturnal, staying up very late self again because I was up ages the other night working on my Physics coursework.
  • The two lines run through the composition, sometimes parallel, sometimes intertwining, with the second one eventually taking over and ultimately finding its closure in a lush, animalic, fantastically sexy, nocturnal base of amber, musk, civet, patchouli and castoreum. Forgotten Chypres: 7e Sense by Sonya Rykiel and Gianni Versace
  • It is a northern animal, nocturnal, and rarely seen, but not uncommon; they are frequently found in ploughed grasslands. Rural Hours
  • Beigel, in Virchow's Archives, mentions a cryptorchid of twenty-two who had nocturnal emissions containing spermatozoa and who indulged in sexual congress. Anomalies and Curiosities of Medicine
  • The platypus and the echidna - a nocturnal, burrowing mammal with a spiny coat, long claws, and no teeth - are the only known living members of a type of animal known as monotremes.
  • They can create nocturnal confusion, can result in cognitive and motor impairment, and can increase the risks of falls.
  • Most communication systems in luminescent fireflies have been studied in nocturnal species; little is known concerning communication in crepuscular and diurnal species.
  • Nocturnal animals sleep by day and hunt by night.
  • Owls hooted in the treetops, while other nocturnal animals came out to forage for food.
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