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WordReference Random House Learner's Dictionary of American English © 2024noc•tur•nal /nɑkˈtɜrnəl/USA pronunciation adj. - of or relating to the night.
- Animal Behavioractive at night (opposed to diurnal ):nocturnal animals.
noc•tur•nal•ly, adv. See -noct-, -nox-. WordReference Random House Unabridged Dictionary of American English © 2024noc•tur•nal (nok tûr′nl),USA pronunciation adj. - of or pertaining to the night (opposed to diurnal).
- done, occurring, or coming at night:nocturnal visit.
- Zoology, Animal Behavioractive at night (opposed to diurnal):nocturnal animals.
- Botanyopening by night and closing by day, as certain flowers (opposed to diurnal).
n. - [Archaic.]an astrolabe for telling time at night or for determining latitude by the position of certain stars in reference to Polaris.
- Late Latin nocturnālis. See nocturn, -al1
- 1475–85
- 2.See corresponding entry in Unabridged nighttime.
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