Disymmetry or Dissymmetry: How To spell?
The word Disymmetry is misspelled against Dissymmetry, a noun meaning "Absence or defect of symmetry; asymmetry."
Dissymmetry has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings di & ymmetry which should not be misspelled with single 'S'
Wrong Spelling:  di-s-ymmetry  Correct Spelling:  di-ss-ymmetry 
Find more wrongly spelled words of Dissymmetry to spell it well.