Pronunciation: /bʌɪˈpəʊlə/
adjective
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1having or relating to two poles or extremities: a sharply bipolar division of affluent and underclass
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relating to or occurring in both North and South polar regions: bipolar species
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2(of psychiatric illness) characterized by both manic and depressive episodes, or manic ones only.
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(of a person) suffering from bipolar disorder.
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3(of a nerve cell) having two axons, one either side of the cell body.
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4 Electronics (of a transistor or other device) using both positive and negative charge carriers.

Derivatives
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Pronunciation: /-ˈlarɪti/
noun