Chayropterygium or Cheiropterygium: How To spell?

The word Chayropterygium is misspelled against Cheiropterygium, a noun meaning "The typical pentadactyloid limb of the higher vertebrates."

Word contains consecutive vowels 'EI' in between alphabets ch & ropterygium is misspelled as 'AY'
Wrong Spelling:  ch-ay-ropterygium 
Correct Spelling:  ch-ei-ropterygium 
Check more misspelled words of Cheiropterygium to spell it correct.