Bipolar is a term used to define things with two (usually opposing) poles. It can refer to: In Medicine Bipolar disorder and its subtypes: Bipolar I Bipolar II Cyclothymia Bipolar cell, a second order neuron of the retina. In charitable organisation MDF The BiPolar Organisation - A UK based charitable organisation In Electronics and electrical engineering Bipolar junction transistor, electronic device. BiCMOS, the integration of bipolar junction transistors and CMOS technology into a sin… (More on Bipolar)