Nocturnal

Nocturnal - Other Definitions

• (a.) Of, pertaining to, done or occuring in, the night; as, nocturnal darkness, cries, expedition, etc.; -- opposed to diurnal.
  
  
• (a.) Having a habit of seeking food or moving about at night; as, nocturnal birds and insects.
  
  
• (n.) An instrument formerly used for taking the altitude of the stars, etc., at sea.
  
  
• (adv.) By night; nightly.