Definitions
from Wiktionary, Creative Commons Attribution/ShareAlike License
 n. Plural form of farad.
Etymologies
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Examples

If the frequency of an AC source is given (in hertz) as f, and the value of a capacitor is given (in units called farads) as C, then the capacitive reactance (in ohms), XC, can be calculated using this formula: XC ¼ À1 = ð2fCÞ

Larger commercial supercapacitors have capacities as high as 3,000 farads.
Transportation Tuesday: The UltraBattery Hybrid Storage Cell  Inhabitat

For instance, a typical Dcell sized electrolytic capacitor will have a storage capacity measured in microfarads, while the same size supercapacitor would store several farads, an improvement of about 10,000 times.
Transportation Tuesday: The UltraBattery Hybrid Storage Cell  Inhabitat

My friend said it had a capacity of 250 micromicro farads, which meant absolutely nothing to me at the time.
The Dawn of Amateur Radio in the U.K. and Greece: a personal view

If quantities are known in microfarads and are to be used in calculations in which the values of the capacity require to be farads, care should be taken to introduce the proper corrective factor.
Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc.

Capacity reactance = 1/_C_ [omega] wherein _C_ is the capacity in farads and [omega] is 2 [pi] _n_, or twice 3.1416 times the frequency.
Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc.

Also watts, amperes and Kilowatt hours, ohms, farads and energy and power density.
Telegraph.co.uk: news, business, sport, the Daily Telegraph newspaper, Sunday Telegraph

The Company has prepared and tested several prototypes, mostly under a grant from the State of Wisconsin, with the goal of filling this need  some prototypes are as low as a couple of farads while others are in the hundreds of farad ranges.

Where C = capacitance in microfarads, f = frequency and PI = 3.14

And tho i do not obviously understand all ov farads teachings ... upon research. .you see he was a very deep man.
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