Search Result for "nocturnal": 
Wordnet 3.0

ADJECTIVE (2)

1. belonging to or active during the night;
- Example: "nocturnal animals are active at night"
- Example: "nocturnal plants have flowers that open at night and close by day"

2. of or relating to or occurring in the night;
- Example: "nocturnal darkness"


The Collaborative International Dictionary of English v.0.48:

Nocturnal \Noc*tur"nal\, a. [L. nocturnalis, nocturnus, fr. nox, noctis, night. See Night, and cf. Nocturn.] 1. Of, pertaining to, done or occuring in, the night; as, nocturnal darkness, cries, expedition, etc.; -- opposed to diurnal. --Dryden. [1913 Webster] 2. Having a habit of seeking food or moving about at night; as, nocturnal birds and insects; raccoons are nocturnal.; -- of animals. [1913 Webster +PJC]
The Collaborative International Dictionary of English v.0.48:

Nocturnal \Noc*tur"nal\, n. An instrument formerly used for taking the altitude of the stars, etc., at sea. --I. Watts. [1913 Webster]
WordNet (r) 3.0 (2006):

nocturnal adj 1: 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" [ant: diurnal] 2: of or relating to or occurring in the night; "nocturnal darkness"