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seasonal affective disorder

recurrent winter depression characterized by oversleeping, overeating, and irritability, and relieved by the arrival of spring or by light therapy.
Abbreviation: SAD.
Origin of seasonal affective disorder
1980-85 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for seasonal-affective-disorder

seasonal affective disorder

a state of depression sometimes experienced by people in winter, thought to be related to lack of sunlight SAD
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Contemporary definitions for seasonal-affective-disorder

depression associated with the reduction of daylight during the shorter days of late autumn and winter; abbr. SAD's 21st Century Lexicon
Copyright © 2003-2014, LLC
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seasonal-affective-disorder in Medicine

seasonal affective disorder sea·son·al affective disorder (sē'zə-nəl)
Abbr. SAD
A mild form of depression occurring at certain seasons of the year, especially depression that recurs in winter and that is characterized by loss of energy and sexual drive, restlessness, and often by a craving for carbohydrates.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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seasonal-affective-disorder in Science
seasonal affective disorder
A mood disorder that occurs during seasons when exposure to sunlight is limited, characterized by symptoms of depression.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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