hypersomnia

hypersomnia definition - medical

hy·per·som·ni·a (hīˌpər-sŏmˈnē-ə)

noun
A condition in which one sleeps for an excessively long time but is normal in the waking intervals.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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