Hypertext Webster Gateway: "insomnia"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Insomnia \In*som"ni*a\, n. [L., fr. insomnis sleepless; pref.
in- not + somnus sleep.]
Want of sleep; inability to sleep; wakefulness;
sleeplessness.
From WordNet (r) 1.7 (wn)
insomnia
n : an inability to sleep; chronic sleeplessness [ant: {hypersomnia}]
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