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May 24, 2013
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Definition of Pre-sleep dream

Pre-sleep dream: Also called a hypnagogic hallucination, this type of dream is characteristically vivid and occurs as one is falling asleep or awakening.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=10485
Last Editorial Review: 6/14/2012

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