Bipolar

Look up bipolar in Wiktionary, the free dictionary.

Bipolar may refer to:

Astronomy

• Bipolar nebula, a distinctive nebular formation
• Bipolar outflow, two continuous flows of gas from the poles of a star

Mathematics

• Bipolar coordinates, a two-dimensional orthogonal coordinate system
• Bipolar set, a derivative of a polar set
• Bipolar theorem, a theorem in convex analysis which provides necessary and sufficient conditions for a cone to be equal to its bipolar

Medicine

• Bipolar disorder, a mental disorder that causes periods of depression and periods of elevated mood
  • Bipolar I disorder, a bipolar spectrum disorder characterized by the occurrence of at least one manic or mixed episode
  • Bipolar II disorder, a bipolar spectrum disorder characterized by at least one episode of hypomania and at least one episode of major depression
  • Bipolar disorder not otherwise specified, a diagnosis for bipolar disorder when it does not fall within the other established sub-types
• Bipolar neuron, a type of neuron which has two extensions

Music

• Bi-Polar (Vanilla Ice album)
• Bipolar, a 2009 album by rock group El Cuarteto de Nos
• "Bipolar", a song by Gloria Trevi from her 2013 album De Película
• Bipolar (Up Dharma Down album)

Technology

• Bipolar electricity transmission, using a pair of conductors in opposite polarity
• Bipolar encoding, a type of line code where two nonzero values are used
  • Bipolar violation, a violation of the bipolar encoding rules
• Bipolar electric motor, an electric motor with only two poles to its stationary field
  • Bi-Polar (locomotive), a locomotive using a bipolar electric motor
• Bipolar signal, a signal that may assume either of two polarities, neither of which is zero

Transistors

• Bipolar junction transistor (BJT)
• Heterojunction bipolar transistor (HBT)
• Insulated-gate bipolar transistor (IGBT)

Other uses

• Bipolarity, polarity in international relations involving two states