From AMS Glossary
Revision as of 19:56, 26 January 2012 by Perlwikibot
The accumulation of an excess of ions of positive sign in the neighborhood of a negative electrode, and vice versa, when ions are continuously produced in the space above the electrode and move under the influence of the electrode's field.
Chalmers, J. A. 1957. Atmospheric Electricity. pp. 25, 148.