hypersomnia

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

noun Pathology.

a tendency to sleep excessively.

Origin of hypersomnia

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

OTHER WORDS FROM hypersomnia

hy·per·som·ni·ac, noun

Words nearby hypersomnia

hypersensitive, hypersensitivity, hypersensitization, hypersensitize, hypersexual, hypersomnia, hypersonic, hyperspace, hypersphere, hypersplenism, hyperstatic

Medical definitions for hypersomnia

hypersomnia
[ hī′pər-sŏm′nē-ə ]

n.

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