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ohm

[ ohm ]
/ oʊm /
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noun
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
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Origin of ohm

First recorded in 1861; named after G. S. Ohm

OTHER WORDS FROM ohm

ohm·ic [oh-mik], /ˈoʊ mɪk/, adjective

Other definitions for ohm (2 of 2)

Ohm
[ ohm ]
/ oʊm /

noun
Ge·org Si·mon, [gey-awrk -zee-mawn] /geɪˈɔrk ˈzi mɔn/ 1787–1854, German physicist.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use ohm in a sentence

British Dictionary definitions for ohm (1 of 2)

ohm
/ (əʊm) /

noun
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 ampereSymbol: Ω

Word Origin for ohm

C19: named after Georg Simon Ohm

British Dictionary definitions for ohm (2 of 2)

Ohm
/ (əʊm) /

noun
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

Medical definitions for ohm

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.

Scientific definitions for ohm (1 of 2)

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.

Scientific definitions for ohm (2 of 2)

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for ohm

ohm
[ (ohm) ]

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

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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