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bipolar disorder

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noun Psychiatry.
  1. an affective disorder characterized by periods of mania alternating with periods of depression, usually interspersed with relatively long intervals of normal mood.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for bipolar disorder

bipolar disorder

bipolar affective disorder or bipolar syndrome

noun
  1. a mental health problem characterized by an alternation between extreme euphoria and deep depression
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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

bipolar disorder in Medicine

bipolar disorder

n.
  1. Any of several mood disorders usually characterized by alternating periods of depression with mania or hypomania.manic-depressive illness
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

bipolar disorder in Science

bipolar disorder

  1. Any of several mood disorders usually characterized by periods of depression that alternate with mania.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

bipolar disorder in Culture

bipolar disorder

Also known as manic-depressive illness. This psychiatric disorder is marked by periods of euphoric (manic) highs often followed by periods of depression.

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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.