noun Psychiatry.

an abnormal fear of night or darkness.

Origin of nyctophobia Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for nyctophobia



psychiatry an abnormal dread of night or darkness
Derived Formsnyctophobic, adjective

Word Origin for nyctophobia

nyct-, from Greek nukt-, nux night + -phobia
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

Word Origin and History for nyctophobia

medical Latin, from nycto- "night" + -phobia "fear." Related: Nyctophobic.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for nyctophobia




An abnormal fear of night or of the dark.scotophobia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.