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ohm

[ohm] /oʊm/
noun
1.
the standard unit of electrical resistance in the International System of Units (SI), formally defined to be the electrical resistance between two points of a conductor when a constant potential difference applied between these points produces in this conductor a current of one ampere. The resistance in ohms is numerically equal to the magnitude of the potential difference. Symbol: Ω.
Origin of ohm
1861
1861; named after G. S. Ohm
Related forms
ohmic
[oh-mik] /ˈoʊ mɪk/ (Show IPA),
adjective

Ohm

[ohm] /oʊm/
noun
1.
Georg Simon
[gey-awrk zee-mawn] /geɪˈɔrk ˈzi mɔn/ (Show IPA),
1787–1854, German physicist.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for ohm
Historical Examples
  • This fine result is the more gratifying since ohm's law is entirely empirical and does not rest at all upon logical deduction.

    The Galaxy Various
  • Wheatstone by his knowledge of ohm's law and the electro-magnet was probably able to enlighten him.

  • ohm's definition of electro-motive force, current strength and resistance eventuated into ohm's law.

    Electricity for Boys J. S. Zerbe
  • We must therefore have a standard for the ohm, which is the measure of resistance.

    Electricity for Boys J. S. Zerbe
  • Along the other side of the room were twenty-four cases, each containing four accumulators of under .005-ohm internal resistance.

    A. D. 2000 Alvarado M. Fuller
  • In applying this illustration to the voltaic cell, we make use of ohm's law.

    Physics Willis Eugene Tower
  • Like many another great discovery in physical science, ohm's work failed to receive the immediate appreciation which it deserved.

    Makers of Electricity Brother Potamian
  • One of these methods depends upon an application of ohm's law.

    Physics Willis Eugene Tower
  • Now connect our standard cell—one volt—through one ohm resistance and we have a current of one ampère.

  • This furlough was perhaps the most important event in ohm's life.

    Makers of Electricity Brother Potamian
British Dictionary definitions for ohm

ohm

/əʊm/
noun
1.
the derived SI unit of electrical resistance; the resistance between two points on a conductor when a constant potential difference of 1 volt between them produces a current of 1 ampere Ω
Word Origin
C19: named after Georg Simon Ohm

Ohm

/əʊm/
noun
1.
Georg Simon (ˈɡeːɔrk ˈziːmɔn). 1787–1854, German physicist, who formulated the law named after him
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
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Word Origin and History for ohm
n.

unit of electrical resistance, 1867, in recognition of German physicist Georg S. Ohm (1789-1854), who determined the law of the flow of electricity. Originally proposed as ohma (1861) as a unit of voltage. Related: ohmage; ohmic; ohmeter.

Online Etymology Dictionary, © 2010 Douglas Harper
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ohm in Medicine

ohm (ōm)
n.
Symbol Ω
A unit of electrical resistance equal to that of a conductor in which a current of one ampere is produced by a potential of one volt across its terminals.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ohm in Science
ohm
  (ōm)   
The SI derived unit used to measure the electrical resistance of a material or an electrical device. One ohm is equal to the resistance of a conductor through which a current of one ampere flows when a potential difference of one volt is applied to it.
Ohm, Georg Simon 1789-1854.  
German physicist who discovered the relationship between voltage, current, and resistance in an electrical circuit, now known as Ohm's law. The ohm unit of electrical resistance is named for him.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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ohm in Culture
ohm [(ohm)]

The unit of electrical resistance, named after the nineteenth-century German physicist Georg Ohm.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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ohm in Technology

unit
The MKS unit of electrical resistance. One Ohm is the resistance of a conductor across which a potential difference of one Volt produces a current of one Ampere. Named after Georg Simon Ohm.
(2003-12-02)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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