Definition of Nocturnal

1. Adjective. Belonging to or active during the night. "Nocturnal plants have flowers that open at night and close by day"

Category relationships: Biological Science, Biology
Antonyms: Diurnal

2. Adjective. Of or relating to or occurring in the night. "Nocturnal darkness"
Partainyms: Night

Definition of Nocturnal

1. a. Of, pertaining to, done or occuring in, the night; as, nocturnal darkness, cries, expedition, etc.; -- opposed to diurnal.

2. n. An instrument formerly used for taking the altitude of the stars, etc., at sea.

Definition of Nocturnal

1. [adj]

Medical Definition of Nocturnal

1. Pertaining to, occurring at or active at night. Origin: L. Nocturnus This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Nocturnal

noctuary
noctuas
noctuid
noctuid
Noctuidae
noctuids
noctuid moth
noctule
noctule
noctules
noctuoid
nocturia
nocturia
nocturn
nocturnal (current term)
nocturnal (current term)
nocturnally
nocturnal amblyopia
nocturnal diarrhoea
nocturnal dyspnea
nocturnal emission
nocturnal enuresis
nocturnal epilepsy
nocturnal myoclonus
nocturnal periodicity
nocturnal vertigo
nocturne
nocturnes
nocturns
nocuous

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