Definition of bipolar disorder
: any of several psychological disorders of mood characterized usually by alternating episodes of depression and mania —called also manic depression, manic-depressive illness
First Known Use of bipolar disorder
Medical Definition of bipolar disorder
: any of several mood disorders characterized usually by alternating episodes of depression and mania or by episodes of depression alternating with mild nonpsychotic excitement—called also bipolar affective disorder, bipolar illness, manic depression, manic-depressive illness, manic-depressive psychosis; compare major depressive disorder
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