From The Collaborative International Dictionary of English v.0.48:

Coulomb \Cou`lomb"\ (k??`l?n"), n. [From Coulomb, a French
   physicist and electrican.] (Physics)
   The standard unit of quantity in electrical measurements. It
   is the quantity of electricity conveyed in one second by the
   current produced by an electro-motive force of one volt
   acting in a circuit having a resistance of one ohm, or the
   quantity transferred by one amp[`e]re in one second. Formerly
   called weber.
   [1913 Webster]
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