I. (ˈ)bī+ adjective
Etymology: bi- (I) + polar
1.
a. : having or involving the use of two poles
a bipolar dynamo
bipolar encephalograph leads
b. of a neuron : having an afferent and an efferent process
2. : relating to or associated with the polar regions
certain marine organisms have a bipolar distribution and are found only north and south of an equatorial or median zone
3. : having or marked by two mutually repellent forces or two diametrically opposed natures, qualities, or views
II. adjective
1. : characterized by the alternation of manic and depressive states
a bipolar disorder
2. : relating to, being, or using a transistor in which both electrons and holes are utilized as charge carriers