hypersomnolence

noun
hy·per·som·no·lence | \ˌhī-pər-ˈsäm-nə-lən(t)s \

Definition of hypersomnolence 

: excessive daytime sleepiness despite sufficient nighttime sleep hypersomnolence brought on by sleep apnea or depression Treatment with CPAP improves quality of life, vigilance, and cognitive function in persons who report hypersomnolence— Kingman P. Strohl also : prolonged nighttime sleep : hypersomnia

First Known Use of hypersomnolence

1918, in the meaning defined above

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The first known use of hypersomnolence was in 1918

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hypersomnolence

noun
hy·per·som·no·lence | \-ˈsäm-nə-lən(t)s \

Medical Definition of hypersomnolence 

: excessive sleepiness : persistent drowsiness … common signs and symptoms include snoring, daytime hypersomnolence, obesity … and the presence of systolic or diastolic hypertension …Scientific American Medicine Bulletin, April 1987

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