Unipolar

adj. having one magnetic pole

Unipolar may refer to:Unipolar depression or unipolar disorder: a state of intense sadness, melancholia or despair that has advanced to the point of being disruptive to an individual's social functioning and/or activities of daily livingUnipolar encoding: a line codeUnipolar generator: a DC electrical generator in which the magnetic field has the same polarity at every point, so that the armature passes through the magnetic field lines of force continually in the same directionUnipolar inductionUnipolar motor: a type of small DC electric motor commonly found in small, portable cassette players.Unipolar neuron: a neuron with a single neurite, round body and with different segments that serve as superficial receptors or terminals.Unipolarity in international relations ("unipolar world") - see polarity in international relations hegemony,
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Adjective
1. having a single pole
(antonym) bipolar

adj. single pole, unipolar

(a.)
Having, or acting by means of, one pole only.
  

(a.)
Having but one pole or process; -- applied to those ganglionic nerve cells which have but one radiating process; -- opposed to multipolar.