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[koo-lom, -lohm, koo-lom, -lohm]
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  1. the standard unit of quanitity of electricity in the International System of Units (SI), equal to the quantity of charge transferred in one second across a conductor in which there is a constant current of one ampere. Abbreviation: C

Origin of coulomb

First recorded in 1880–85; after Coulomb


[koo-lom, -lohm, koo-lom, -lohm; French koo-lawn]
  1. Charles Au·gus·tin de [sharl oh-gy-stan duh] /ʃarl oʊ güˈstɛ̃ də/, 1736–1806, French physicist and inventor.
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British Dictionary definitions for coulomb


  1. the derived SI unit of electric charge; the quantity of electricity transported in one second by a current of 1 ampereSymbol: C

Word Origin

C19: named after Charles Augustin de Coulomb


  1. Charles Augustin de (ʃarl oɡystɛ̃ də). 1736–1806, French physicist: made many discoveries in the field of electricity and magnetism
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 coulomb


1881, named for French chemist Charles-Augustin de Coulomb (1736-1806), who devised a method of measuring electrical quantity. It is the quantity of electricity conveyed in 1 second by a current of 1 ampere. The name is a French form of Columbus.

Online Etymology Dictionary, © 2010 Douglas Harper

coulomb in Medicine


(kōōlŏm′, -lōm′)
  1. The unit of electrical charge in the meter-kilogram-second system equal to the quantity of charge transferred in one second by a steady current of one ampere.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

coulomb in Science


[kōōlŏm′, kōōlōm′]
  1. The SI derived unit used to measure electric charge. One coulomb is equal to the quantity of charge that passes through a cross-section of a conductor in one second, given a current of one ampere.


  1. French physicist who was a pioneer in the study of magnetism and electricity. He is best known for the formulation of Coulomb's law, which he developed as a result of his investigations of Joseph Priestley's work on electrical repulsion. Coulomb also established a law governing the attraction and repulsion of magnetic poles. The coulomb unit of electric charge is named for him.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.