font size

Definition of Fear of the dark

Fear of the dark: Pathological fear of the dark, an abnormal and persistent dread of the dark. Sufferers experience undue anxiety even though they may rationally realize that the dark does not pose a threat commensurate with their fear.

Fear of the dark is termed "nyctophobia," a word derived from the Greek "nyx" (night) and the Greek "phobos" (fear). "Nyx" has also contributed to other medical terms such as "nyctalopia" (night blindness) and "nyctanopia" (impaired vision in dim light and in the dark). Other terms for fear of the dark include scotophobia and achluophobia.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=12312
Last Editorial Review: 6/14/2012

Drug Medical Dictionary of Terms by Letter

Top RxList Drug News

Emotional Wellness

Get tips on therapy and treatment.

advertisement
advertisement
Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations