Quiz: Remember the definition of mal de mer?
a fear of night, darkness; also called noctiphobia
medical Latin, from nycto- "night" + -phobia "fear." Related: Nyctophobic.
nyctophobia nyc·to·pho·bi·a (nĭk'tə-fō'bē-ə)n. An abnormal fear of night or of the dark. Also called scotophobia.