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also hyp·no·gog·ic  (hĭp′nə-gŏj′ĭk, -gō′jĭk)
1. Inducing sleep; soporific.
2. Of, relating to, or occurring in the state of intermediate consciousness preceding sleep: hypnagogic hallucinations.

[French hypnagogique : Greek hupnos, sleep; see hypno- + Greek agōgos, leading (from agein, to lead; see ag- in Indo-European roots).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌhɪpnəˈɡɒdʒɪk) or


(Psychology) psychol of or relating to the state just before one is fully asleep. See also hypnagogic image, hypnopompic
[C19: from French hypnagogique; see hypno-, -agogic]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌhɪp nəˈgɒdʒ ɪk, -ˈgoʊ dʒɪk)

1. of or pertaining to the period of drowsiness between wakefulness and sleep: hypnagogic hallucinations. Compare hypnopompic.
2. inducing drowsiness.
[1885–90; < French hypnagogique; see hypn-, -agogue, -ic]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.hypnagogic - sleep inducing
depressant - capable of depressing physiological or psychological activity or response by a chemical agent
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


a. hipnagógico-a.
1. adormecedor-a, que induce el sueño;
2. que experimenta alucinaciones o sueños antes de perder el conocimiento o de pasar a un sueño profundo.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
Narcolepsy is a prolonged neurological disorder related to excessive daytime sleepiness (EDS), cataplexy, hypnagogic hallucinations, sleep paralysis, and fragmented night sleep.
Although not unique to narcolepsy, common findings include hypnagogic hallucinations and sleep paralysis.
"And their response is usually, 'How did you know that?"Stickgold says that a lot of people remember their dreams from a sleep onset period, when the mind starts wandering and dreamlike imagery occurs as people drift in and out of sleep a process called "hypnagogic dreaming".
(And of course, like a bad trip, the night can be full of terror: hypnagogic hallucinations causing mysterious shadows to sway before your open eyes or inducing furniture to hulk and loom.)
Q I have depression, and recently I started experiencing occasional hypnagogic hallucinations at bedtime.
Causes include psychosis, drugs, delirium, Charles Bonnet syndrome, compressive tumors, migraines, and hypnagogic phenomena [2].
Figure 2 shows hypnagogic paroxysmal spike and wave discharges during drowsiness (a) and central sleep apneas (CSA) during the REM stage (b).
Bratsch acts as a looking glass, Kraus as an electro- hypnagogic spacewalker through painted matter: over and out!
("hypnagoia logia") These poems are less invested in explicit communication than in the oddities of the hypnagogic state, in between the sleeping and waking lives.
At first it felt like I was in some hypnagogic nightmare, where monsters would grab me from behind and I struggle to escape.