Cuirases or Cuirasses: How To spell?
The word Cuirases is misspelled against Cuirasses, which is plural of "Cuirass"
Cuirasses has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings cuira & es which should not be misspelled with single 'S'
Wrong Spelling:  cuira-s-es  Correct Spelling:  cuira-ss-es 
Check more misspelled words of Cuirasses to spell it correct.