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night terror

noun, Psychiatry.
a sudden feeling of extreme fear that awakens a sleeping person, usually during slow-wave sleep, and is not associated with a dream or nightmare.
Also called sleep-terror disorder.
Origin of night terror
First recorded in 1895-1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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night-terrors in Medicine

night-terrors n.
A state of intense fear and agitation, usually occurring in children, that causes the person to wake up screaming with fear and to remain distressed during a period of semiconsciousness.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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