[ ˌnɪktə(ʊ)'fəʊbɪə ]
■ noun extreme or irrational fear of the night or of darkness.
Origin
C19: from Gk nux , nukt- 'night' + phobia .
NYCTOPHOBIA
Meaning of NYCTOPHOBIA in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004