hypersomniac

hypersomnia

[hahy-per-som-nee-uh]
noun Pathology.
a tendency to sleep excessively.

Origin:
1875–80; hyper- + (in)somnia

hypersomniac, noun
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American Heritage
Medical Dictionary

hypersomnia hy·per·som·ni·a (hī'pər-sŏm'nē-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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