Bipolar

Bipolar may refer to:

Astronomy

• Bipolar nebula, a two-lobed, axially symmetric nebula
• Bipolar outflow, outflow of ejected materials from both poles of a star

Mathematics

• Bipolar coordinates, a type of orthogonal coordinates based on the Apollonian circles
• Polar set, sometimes called a bipolar set, is the polar of a polar set
• Bipolar theorem, a theorem relating the polar cone to its bipolar

Medicine

• Bipolar disorder, a psychiatric illness with subtypes Bipolar I disorder, Bipolar II disorder, and Bipolar NOS
• Bipolar neuron, a type of neuron

Music

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

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