farad

[far-uhd, -ad]
noun Electricity.
the standard unit of capacitance in the International System of Units (SI), formally defined to be the capacitance of a capacitor between the plates of which there appears a potential difference of one volt when it is charged by a quantity of electricity equal to one coulomb. Symbol: F

Origin:
1860–65; named after M. Faraday

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World English Dictionary
farad (ˈfærəd, -æd)
 
n
physics F the derived SI unit of electric capacitance; the capacitance of a capacitor between the plates of which a potential of 1 volt is created by a charge of 1 coulomb
 
[C19: named after Michael Faraday]

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Etymonline
Word Origin & History

farad
unit of electric capacity, suggested 1861, first used 1868, named for Eng. physicist Michael Faraday (1791-1867).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

farad far·ad (fār'əd, -ād')
n.
The unit of capacitance in the meter-kilogram-second system equal to the capacitance of a capacitor having a charge of 1 coulomb when a potential difference of 1 volt is applied.

The American Heritage® Stedman's Medical Dictionary
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Science Dictionary
farad   (fār'əd)  Pronunciation Key 
The SI derived unit used to measure electric capacitance. A capacitor in which a stored charge of one coulomb provides an electric potential difference of one volt across its plates has a capacitance of one farad.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

farad

unit of electrical capacitance (ability to hold an electric charge), in the metre-kilogram-second system of physical units, named in honour of the English scientist Michael Faraday. The capacitance of a capacitor is one farad when one coulomb of electricity changes the potential between the plates by one volt. In terms of ordinary electric and electronic equipment, the farad is enormous, and capacitors are generally rated in microfarads (one microfarad equals 10-6 farad) or picofarads (10-12 farad).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Capacitances on the order of several tens of farad per gram of electrode are achieved.
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