[ nok-tur-nl ]
/ nɒkˈtɜr nl /
Archaic. an astrolabe for telling time at night or for determining latitude by the position of certain stars in reference to Polaris.
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SYNONYMS FOR nocturnal
noc·tur·nal·i·ty, nounnoc·tur·nal·ly, adverbnon·noc·tur·nal, adjectivenon·noc·tur·nal·ly, adverb
sem·i·noc·tur·nal, adjectiveun·noc·tur·nal, adjectiveun·noc·tur·nal·ly, adverb
Can be confuseddiurnal nocturnal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for nocturnality
/ (nɒkˈtɜːnəl) /
of, used during, occurring in, or relating to the night
(of animals) active at night
(of plants) having flowers that open at night and close by day
Derived Formsnocturnality, nounnocturnally, adverb
Word Origin for nocturnal
C15: from Late Latin nocturnālis, from Latin nox night
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medicine definitions for nocturnality
[ nŏk-tûr′nəl ]
Of, relating to, or occurring in the night.
Most active at night.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for nocturnality
[ nŏk-tûr′nəl ]
Occurring at night.
Most active at night. Many animals, such as owls and bats, are nocturnal.
Having flowers that open during the night and close at daylight. Nocturnal plants are often pollinated by moths. Compare diurnal.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.