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 Bipolar coordinates are a two-dimensional orthogonal coordinate system based on the Apollonian circles.Eric W. Weisstein, Concise Encyclopedia of Mathematics CD-ROM, ''Bipolar Coordinates'', CD-ROM edition 1.0, May 20, 1999 Confusingly, the sam ...

, 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 Bipolar disorder, previously known as manic depression, is a mental disorder characterized by periods of depression and periods of abnormally elevated mood that last from days to weeks each. If the elevated mood is severe or associated with ...

, a mental disorder that causes periods of depression and periods of elevated mood **

Bipolar I disorder Bipolar I disorder (BD-I; pronounced "type one bipolar disorder") is a type of bipolar spectrum disorder characterized by the occurrence of at least one manic episode, with or without mixed or psychotic features. Most people also, at other time ...

, a bipolar spectrum disorder characterized by the occurrence of at least one manic or mixed episode **

Bipolar II disorder Bipolar II disorder (BP-II) is a mood disorder on the bipolar spectrum, characterized by at least one episode of hypomania and at least one episode of major depression. Diagnosis for BP-II requires that the individual must never have experience ...

, 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 Bipolar disorder not otherwise specified (BD-NOS) is a diagnosis for bipolar disorder (BD) when it does not fall within the other established sub-types. Bipolar disorder NOS is sometimes referred to as subthreshold bipolar disorder. Classificati ...

, 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

* ''Bipolar'' (Up Dharma Down album), 2008 * ''Bi-Polar'' (Vanilla Ice album), 2001 * ''Bipolar'', a 2009 album by rock group

El Cuarteto de Nos El Cuarteto de Nos (stylized as Cuarteto de Nos) is an Uruguayan rock group formed in 1980 in Montevideo, Uruguay. Over the years, due to its particular sound that mixes elements of hip hop, alternative rock, comedy rock and Latin music, the gro ...

*"Bipolar", a song by Blonde Redhead from their 1997 album ''

Fake Can Be Just as Good ''Fake Can Be Just as Good'' is the third studio album by American alternative rock band Blonde Redhead. It was released on March 11, 1997 by Touch and Go Records. Track listing Personnel Credits are adapted from the album's liner notes. Blo ...

'' * "Bipolar", a song by Gloria Trevi from her 2013 album ''De Película'' * "Bipolar", a song by Gucci Mane from his 2018 album '' Evil Genius'' *"Bipolar", a 2019 song by

Kiiara Kiara Saulters (born May 24, 1995), known professionally as Kiiara, is an American singer and songwriter from Wilmington, Illinois. She is currently signed to Atlantic Records. Her 2015 single "Gold" peaked at number 13 on the ''Billboard'' Ho ...

*"Bi Polar", a 2021 song by Bhad Bhabie

Technology

Bipolar electricity transmission A high-voltage direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC) for electric power transmission, in contrast with the more common alternating curren ...

, using a pair of conductors in opposite polarity *

Bipolar encoding In telecommunication, bipolar encoding is a type of return-to-zero (RZ) line code, where two nonzero values are used, so that the three values are +, −, and zero. Such a signal is called a duobinary signal. Standard bipolar encodings are designed ...

, a type of line code where two nonzero values are used **

Bipolar violation A bipolar violation, bipolarity violation, or BPV, is a violation of the bipolar encoding rules where two pulses of the same polarity occur without an intervening pulse of the opposite polarity. This indicates an error in the transmission of the s ...

, a violation of the bipolar encoding rules *

Bipolar electric motor A bipolar electric motor is an electric motor with only two (hence ''bi-'') poles to its stationary field. They are an example of the simple brushed DC motor, with a commutator. This field may be generated by either a permanent magnet or a field ...

, an electric motor with only two poles to its stationary field **

Bipolar (locomotive) The Milwaukee Road's class EP-2 comprised five electric locomotives built by General Electric in 1919. They were often known as Bipolars, which referred to the bipolar electric motors they used. Among the most distinctive and powerful electric ...

, 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 Polarity in international relations is any of the various ways in which power is distributed within the international system. It describes the nature of the international system at any given period of time. One generally distinguishes three types o ...

involving two states