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insomnia - 7 dictionary results
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in⋅som⋅ni⋅a

   [in-som-nee-uh]
–noun
inability to obtain sufficient sleep, esp. when chronic; difficulty in falling or staying asleep; sleeplessness.
Origin:
1685–95; < L, equiv. to insomn(is) sleepless (in- in- 3 + somn(us) sleep + -is adj. suffix) + -ia -ia
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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Language Translation for : insomnia
Spanish: insomnio, German: die Schlaflosigkeit, Japanese: 不眠症
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in·som·ni·a     (ĭn-sŏm'nē-ə)  Pronunciation Key 
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.]

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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insomnia 
1623, Anglicized as insomnie, from L. insomnia "want of sleep," from in- "not" + somnus "sleep" (see somnolence). The modern form is from 1758. Insomniac (n.) is from 1908.

Online Etymology Dictionary, © 2001 Douglas Harper
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insomnia

noun
an inability to sleep; chronic sleeplessness [ant: hypersomnia] 

WordNet® 3.0, © 2006 by Princeton University.
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insomnia   (ĭn-sŏm'nē-ə)  Pronunciation Key 
Chronic inability to fall asleep or remain asleep for an adequate length of time.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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insomnia [(in-som-nee-uh)]

A persistent and prolonged inability to sleep.


[Chapter:] Medicine and Health


The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Insomnia

In*som"ni*a\, n. [L., fr. insomnis sleepless; pref. in- not + somnus sleep.] Want of sleep; inability to sleep; wakefulness; sleeplessness.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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