http://www.wisegeek.org/what-is-the-dif ... ectric.htm
and "Electric has to do with the general concept of electricity."there is a subtle difference between the correct usage of each word.
and "... electronic is a term that is descriptive of devices that are powered by electricity."
Anyway... after using electricity all my life this question occurred to me in reading this instructables "12V-180kV: A Battery Powered Marx Generator (and introduction to electronics)"
... and until now zero mention of the "Marx Generator" on ES either, that I could find.