Disepiment or Dissepiment: How To spell?
The word Disepiment is misspelled against Dissepiment, a noun meaning "A separating tissue; a partition; a septum."
Dissepiment has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings di & epiment which should not be misspelled with single 'S'
Wrong Spelling:  di-s-epiment  Correct Spelling:  di-ss-epiment 
Find more wrongly spelled words of Dissepiment to spell it well.