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hypersomnia

[ hahy-per-som-nee-uh ]
/ ˌhaɪ pərˈsɒm ni ə /
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noun Pathology.

a tendency to sleep excessively.

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Origin of hypersomnia

First recorded in 1875–80; hyper- + (in)somnia

OTHER WORDS FROM hypersomnia

hy·per·som·ni·ac, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Medical definitions for hypersomnia

hypersomnia
[ hī′pər-sŏmnē-ə ]

n.

A condition in which one sleeps for an excessively long time but is normal in the waking intervals.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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