hypersomnolence

/ˌhaɪpərˈsɑmnələns/
noun
  1. Extreme sleepiness or drowsiness, especially during the day, often as a symptom of a medical condition.
    • Chronic hypersomnolence is sometimes linked to depression or sleep apnea.
    • The patient reported hypersomnolence even after a full night's sleep.
    • Hypersomnolence can make it dangerous to drive or operate machinery.
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