Mesidor or Messidor: How To spell?

The word Mesidor is misspelled against Messidor, a noun meaning "The tenth month of the French republican calendar dating from September 22, 1792. It began June 19, and ended July 18. See VendEmiaire."

--> Messidor has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings me & idor which should not be misspelled with single 'S'
Wrong Spelling:  me-s-idor 
Correct Spelling:  me-ss-idor 
Find more incorrect spellings of Messidor to spell right way.

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