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Adjective: unipolar  ,yoo-ni'pow-lu(r)
  1. Having a single pole
    "The unipolar transistor conducts current in only one direction"
     
  2. (politics) having or dominated by a single centre of power
    "The unipolar world order after the Cold War"
     
  3. (psychiatry) characterized by depression without manic episodes
    "Unipolar depression differs from bipolar disorder"

Antonym: bipolar

Encyclopedia: Unipolar