polarity

[poh-lar-i-tee, puh-]
noun
1.
Physics.
a.
the property or characteristic that produces unequal physical effects at different points in a body or system, as a magnet or storage battery.
b.
the positive or negative state in which a body reacts to a magnetic, electric, or other field.
2.
the presence or manifestation of two opposite or contrasting principles or tendencies.
3.
Linguistics.
a.
(of words, phrases, or sentences) positive or negative character.

Origin:
1640–50; polar + -ity

nonpolarity, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
polarity (pəʊˈlærɪtɪ)
 
n , pl -ties
1.  the condition of having poles
2.  the condition of a body or system in which it has opposing physical properties at different points, esp magnetic poles or electric charge
3.  the particular state of a part of a body or system that has polarity: an electrode with positive polarity
4.  the state of having or expressing two directly opposite tendencies, opinions, etc

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

polarity po·lar·i·ty (pō-lār'ĭ-tē, pə-)
n.

  1. The property of having two opposite poles, such as those possessed by a magnet, or of having opposite properties or characteristics.

  2. The direction or orientation of positivity relative to negativity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
polarity   (pō-lār'ĭ-tē)  Pronunciation Key 
The condition of having poles or being aligned with or directed toward poles, especially magnetic or electric poles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Fortunately, it's easy to rewire an outlet with reversed polarity.
Every election establishes a polarity that's wider than the reality.
Variations in the magnetic polarity even revealed joins where one pipe met
  another.
But oils and many other organic compounds have weak or no polarity and cause
  such gels to collapse.
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