Diseminative or Disseminative: How To spell?
The word Diseminative is misspelled against Disseminative, an adjective meaning "Tending to disseminate, or to become disseminated."
Disseminative has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings di & eminative which should not be misspelled with single 'S'
Wrong Spelling:  di-s-eminative  Correct Spelling:  di-ss-eminative 
Find more wrongly spelled words of Disseminative to spell it well.