Cystoidaun or Cystoidean: How To spell?
The word Cystoidaun is misspelled against Cystoidean, a noun meaning "Same as Cystidean."
Cystoidean has vowels 'ea' together mispronounced as 'au'Word contains consecutive vowels 'EA' in between alphabets cystoid & n is misspelled as 'AU'
Wrong Spelling:  cystoid-au-n  Correct Spelling:  cystoid-ea-n 
Check more misspelled words of Cystoidean to spell it correct.