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Noun: insomnia  in'sóm-nee-u
  1. An inability to sleep; chronic sleeplessness

Derived forms: insomnias

Type of: sleep disorder

Antonym: hypersomnia

Encyclopedia: Insomnia Insomnia, fatal familial

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insolation
insole
insolence
insolent
insolently
insolubility
insoluble
insolvable
insolvency
insolvent
insomnia
insomniac
insomuch
insouciance
insouciant
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inspect
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inspection and repair
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inspector general