Definition of Hypersomnia

1. Noun. An inability to stay awake.

Specialized synonyms: Catalepsy, Narcolepsy
Generic synonyms: Sleep Disorder
Antonyms: Insomnia

Definition of Hypersomnia

1. Noun. (medicine) Excessive sleepiness ¹

¹ Source: wiktionary.com

Medical Definition of Hypersomnia

1. Excessive need to sleep. (12 Dec 1998)

Lexicographical Neighbors of Hypersomnia

hypersilyl
hyperskeocytosis
hypersleep
hyperslice
hyperslices
hypersocial
hypersociality
hypersoft
hypersomatotropism
hypersomnia (current term)
hypersomniac
hypersomnias
hypersomnolence
hypersonic
hypersonically
hypersound
hyperspace
hyperspace drive
hyperspaces
hyperspatial
hyperspecialist
hyperspecialists
hyperspecialization
hyperspecializations

Literary usage of Hypersomnia

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Pituitary Body and Its Disorders: Clinical States Produced by Disorders by Harvey Cushing (1912)
"Drowsiness and Torpidity (hypersomnia).—It has been shown experimentally not ... A most notable example of seemingly seasonal hypersomnia is exhibited by ..."

2. Moonbeams from the Larger Lunacy by Stephen Leacock (1915)
""I'm. afraid of it developing into hypersomnia. These are cases where it's been known to grow intd, a sort of lethargy that pretty well stops , \^11 brain ..."

3. Presidential Advisory Committee on Gulf War Veterans' Illnesses: Final Report edited by Joyce C Laslof, Marguerite Knox, John D Baldeschwieler (1997)
"(4) insomnia or hypersomnia nearly every day. (3) significant weight loss when not dieting or weight gain (eg, a change of more than 5% of body weight in a ..."

4. Assessment and Treatment of Patients With Coexisting Mental Illness and by Richard Ries (1996)
"... to depressed patients who experience low energy and hypersomnia (Davis and Goldman, 1992). Other side effects of tricyclic antidepressants are common. ..."

5. Mammalian Models for Research on Aging by Bennett J. Cohen, Institute Of Laboratory Animal Resources, National Research Council Staff (1981)
"... irritable, worried, or discouraged and at least five of the following: • a change in appetite or weight; • sleep difficulty (insomnia or hypersomnia); ..."

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