I just noticed the request for deletion, I don't know whether cumulation is a formal word but it does seem likely since accumulation is. Just checking with my copy of the Oxford English Dictionary - its ISBN number is : 978-0-19-861057-1 and it describes cumulation as a derivative of cumulate - on page 423. Hope that helps.
I'm sorry I don't have an account on this site, I simply do not use it often enough to need one - but I am Lucien86 on the main Wikipedia site. Now can add a proper sig - Lucien86 19:39, 30 August 2011 (UTC)
