[in-som-nee-uh] 
| inability to obtain sufficient sleep, esp. when chronic; difficulty in falling or staying asleep; sleeplessness. |
| in·som·ni·a (ĭn-sŏm'nē-ə) n. Chronic inability to fall asleep or remain asleep for an adequate length of time. [Latin īnsomnia, from īnsomnis, sleepless : in-, not; see in-1 + somnus, sleep; see swep- in Indo-European roots.] |
A persistent and prolonged inability to sleep.
insomnia in·som·ni·a (ĭn-sŏm'nē-ə)
n.
Chronic inability to fall asleep or remain asleep for an adequate length of time.
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