that is interesting, as former xeroid (what we called our self, but corporate hated the name), i remember being told the word came from xero (greek for dry) graphy (writing) -- since xerox machine were replacing 'wet' copiers. Xerox was made up, with xerography in mind...

never really looked up xero to see if it did mean dry i am surprized OED didn't have a comment.. (but maybe it does under the word xerography.)