INSOMNIA
Insomnia
Insomnia, or sleeplessness, is a sleep disorder in which there is an inability to fall asleep or to stay asleep as long as desired. While the term is sometimes used to describe a disorder demonstrated by polysomnographic evidence of disturbed sleep, insomnia is often practically defined as a positive response to either of two questions: "Do you experience difficulty sleeping?" or "Do you have difficulty falling or staying asleep?"The above text is a snippet from Wikipedia: Insomnia
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insomnia
Noun
The above text is a snippet from Wiktionary: insomnia
and as such is available under the Creative Commons Attribution/Share-Alike License.