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Definition of Hypnic

Hypnic: 1. Inducing sleep. 2. Pertaining to sleep. A hypnic jerk is a sleep start or jerk.

From the Greek hypnikos, from the Greek hypnos, sleep.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=24768
Last Editorial Review: 6/14/2012

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