Dissymetry or Dissymmetry: How To spell?
The word Dissymetry is misspelled against Dissymmetry, a noun meaning "Absence or defect of symmetry; asymmetry."
Dissymmetry has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings dissy & etry which should not be misspelled with single 'M'
Wrong Spelling:  dissy-m-etry  Correct Spelling:  dissy-mm-etry 
Find more wrongly spelled words of Dissymmetry to spell it well.