somni-, somno-, somn-, -somnia, -somniac +

Sleeplessness; unable to sleep; bad sleeping conditions.

1. Sleep disorders characterized by a disturbance in the amount, quality, or timing of sleep.
2. Any disturbances of normal sleep or rhythm pattern.
3. Any disturbance involving the amount, quality, or timing of sleep.

They include primary insomnia, primary hypersomnia, narcolepsy, breathing-related sleep disorders, altitude insomnia, food allergy insomnia, environmental sleep disorder, and circadian rhythm sleep disorders.

A person who has a disturbance of normal sleep.

1. A condition characterized by abnormally long or frequent periods, or abnormal depth, of sleep.
2. Excessive or uncontrollable sleepiness.
3. A condition in which sleep periods are excessively long, but the person responds normally in the intervals; distinguished from somnolence.

A condition of getting insufficient sleep.

A reduction in the time of sleeping; insufficient sleep for anyone.

Decrease in normal sleepiness.

1. The inability to sleep; sleeplessness.
2. Inability to sleep, in the absence of external impediments; such as, noise, a bright light, etc., during the period when sleep should normally occur.

It may vary in degree from restlessness or disturbed slumber to a curtailment of the normal length of sleep or to absolute wakefulness.

1. Chronic inability to fall asleep or to remain asleep for an adequate length of time.
2. Someone who can not sleep; sleeplessness.
3. Exhibiting, tending toward, or producing insomnia.

The state of being insomnolent; insomnia.

Occurring in the midst of a dream

Between sleeping and waking.

Lake of the Dreamers (a part of the "face" of the moon); one of the "Lunar Seas".

Affected with insomnia; sleepless, unable to sleep.

Marsh of Sleep (a lunar "sea" as shown on the "face" of the moon).