Difission or Diffission: How To spell?
The word Difission is misspelled against Diffission, a noun meaning "Act of cleaving or splitting."
Diffission has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Di & ission which should not be misspelled with single 'F'
Wrong Spelling:  Di-f-ission  Correct Spelling:  Di-ff-ission 
Find more incorrect spellings of Diffission to spell right way.