Examples from the Web for hypnagogic
Nighttime “visitations” may be chalked up to sleep deprivation, to hypnagogic or hypnopompic hallucinations.
These ‘hypnagogic illusions’ Pontus de Tyard described in a pretty sonnet, more than three hundred years ago.
And there are crystal-seers who are not subject to hypnagogic illusions.
On the contrary, hypnagogic illusion is, with me, a decided phenomenon.Metapsychical Phenomena|J. Maxwell
For bad visualisers, on the other hand, the vividness of these hypnagogic pictures may be absolutely a revelation.Human Personality and its Survival of Bodily Death|Frederick W. H. Myers
The experience of hypnagogic illusions also seems far more rare than ordinary dreaming in sleep.