The Collaborative International Dictionary of English v.0.48:

Farad \Far"ad\, n. [From Michael Faraday, the English
   electrician.] (Elec.)
   The standard unit of electrical capacity; the capacity of a
   condenser whose charge, having an electro-motive force of one
   volt, is equal to the amount of electricity which, with the
   same electromotive force, passes through one ohm in one
   second; the capacity, which, charged with one coulomb, gives
   an electro-motive force of one volt.
   [1913 Webster]

WordNet (r) 3.0 (2006):

farad
    n 1: the capacitance of a capacitor that has an equal and
         opposite charge of 1 coulomb on each plate and a voltage
         difference of 1 volt between the plates [syn: farad, F]