Bipolar (adjective)

1. Relating to or characterized by bipolar disorder, a mental condition characterized by alternating episodes of mania and depression.
2. Having or characterized by two poles or extremities; dual or double.

Origin:

Late 19th century; earliest use found in british medical journal. from bi- + polar.

Examples:

1. The patient was diagnosed with bipolar disorder.
2. The bipolar disorder causes alternating episodes of mania and depression.
3. Bipolar patients experience extreme mood swings.
4. The bipolar cell in the retina of the eye is sensitive to both light and dark.
5. The bipolar transistor is a type of electronic component with two active electrodes.