Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Language: Late Latin
Origin: nocturnalis, from Latin nocturnus 'by night', from nox 'night'

nocturnal

 adjective
     
NEW! See related topics: ANIMALSCHRONOLOGY
noc‧tur‧nal
1HBA an animal that is nocturnal is active at night:
Hamsters are nocturnal creatures.
2 formalTMC happening at night:
Rebecca paid a nocturnal visit to the flat.
Definition from the Longman Dictionary of Contemporary English
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