|a.||1.||Of, pertaining to, done or occuring in, the night; |
|2.||Having a habit of seeking food or moving about at night; |
|n.||1.||An instrument formerly used for taking the altitude of the stars, etc., at sea.|
|Adj.||1.||nocturnal - 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"|
diurnal - belonging to or active during the day; "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"
|2.||nocturnal - of or relating to or occurring in the night; "nocturnal darkness"|
|3.||nocturnal - of or during or relating to the night; "a nocturnal journey"; "nocturnal stillness"; "nocturnal predators"|