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 Dictionaryhttp://www.medterms.com/script/main/art.asp?articlekey=24768
Last Editorial Review: 6/14/2012
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