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 excitementâcalled also bipolar affective disorder, bipolar illness, manic depression, manic-depressive illness, manic-depressive psychosis; ....efinition of BIPOLAR DISORDER. : any of several psychological disorders of mood characterized usually by alternating episodes of depression and mania âcalled also manic depression, manic-depressive illness.
Algebra is a powerful and rich branch of mathematics that is useful in everyday life as well as business, engineering, and other technical fields.
Algebra uses symbols to represent quantities without fixed values, known as variables. Credit: Volt Collection | Shutterstock. Algebra is a branch of mathematics dealing with symbols and the rules for manipulating those symbols. In elementary algebra, those symbols (today written as Latin and Greek letters) represent quantities without fixed values, known as variables.