an affective disorder characterized by periods of mania alternating with periods of depression, usually interspersed with relatively long intervals of normal mood. noun a mental health problem characterized by an alternation between extreme euphoria and deep depression bipolar disorder Any of several mood disorders usually characterized by periods of depression that alternate with mania.
bipolar transistor bipolar transistor A type of transistor made of three layers of semiconductors. Each layer has been treated so that the layer in the middle (called the base) has an inherent electric charge, while the layers around it (the emitter and collector) have an inherent opposite charge. A bipolar transistor with a negative base […]