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nocturnal

Pertaining to, occurring at or active at night.

Origin: L. Nocturnus Of or during or relating to the night; a nocturnal journey; nocturnal stillness; nocturnal predators.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.Of or relating to or occurring in the night; nocturnal darkness.Pertaining to the night.