• synonyms


  1. Also homopolar. Physics. having or pertaining to a single magnetic or electric pole.
  2. Anatomy. of or relating to a nerve cell in spinal and cranial ganglia in which the incoming and outgoing processes fuse outside the cell body.
Show More

Origin of unipolar

First recorded in 1805–15; uni- + polar
Related formsu·ni·po·lar·i·ty [yoo-nuh-poh-lar-i-tee, -puh-] /ˌyu nə poʊˈlær ɪ ti, -pə-/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unipolar

Contemporary Examples

Historical Examples

British Dictionary definitions for unipolar


  1. of, concerned with, or having a single magnetic or electric pole
  2. (of a nerve cell) having a single process
  3. (of a transistor) utilizing charge carriers of one polarity only, as in a field-effect transistor
  4. (of nervous depression) occurring without accompanying bouts of mania
  5. dominated by one superpower, esp the United StatesSee bipolar
Show More
Derived Formsunipolarity (ˌjuːnɪpəʊˈlærɪtɪ), noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unipolar


1812, from uni- + polar.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

unipolar in Medicine


  1. Having a single fibrous process. Used of a neuron.
  2. Situated at only one extremity of a cell.
Show More
Related formsu′ni•po•lari•ty (-pō-lărĭ-tē, -pə-) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.