See Also: Nocturnal(medicine)
nocturnal(dictionary)
nocturnal(dictionary)
nocturnal dyspnea(medicine)
Nocturnal emission(health)
nocturnal amblyopia(medicine)
nocturnal diarrhoea(medicine)
nocturnal vertigo(medicine)
nocturnal periodicity(medicine)
nocturnal myoclonus(medicine)

nocturnal (iou)



nocturnal adjective & noun. L15.
[Late Latin nocturnalis, from nocturnus: see NOCTURN noun, -AL1. Cf. DIURNAL.]
A. adjective.
Of or pertaining to the night; done, held, or occurring during the night. L15.
nocturnal arc: see ARC noun 1. nocturnal emission involuntary ejaculation of seminal fluid during sleep. nocturnal enuresis Medicine persistent involuntary urination during the night, esp. by a child.
O. Sacks Attacks are nocturnal and wake the patient from deep sleep. N. Lowndes A nocturnal blizzard had come on.
Of an animal: active (only) during the night. L16.
b. transf. Of a person: practising an activity or occupation by night; preferring to be active at night. E19.
Of the nature of a nocturne. rare. L19.
b. noun.
Chiefly Nautical (now Hist.). An instrument for calculating latitude from the position of the polestar. L16.
A person out at night, a night-walker. Now rare. L17.
nocturnally adverb (a) nightly; (b) by night, during the night: LME.