half-cell definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a cell consisting of an electrode immersed in a suitable electrolyte, designed to measure single electrode potentials
half-cell definition by American Heritage Dictionary
Either of the two connected parts of an electrochemical cell, consisting of one electrode in a conductive fluid.