electrolytic cell

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A cell containing an electrolyte through which an externally generated electric current is passed by a system of electrodes in order to produce an electrochemical reaction.
• noun A cell containing an electrolyte in which an electrochemical reaction produces an electromotive force.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a cell containing an electrolyte in which an applied voltage causes a reaction to occur that would not occur otherwise (such as the breakdown of water into hydrogen and oxygen)