Cloustra or Claustra: How To spell?

The word Cloustra is misspelled against Claustra, which is plural of "Claustrum"

Word contains consecutive vowels 'AU' in between alphabets cl & stra is misspelled as 'OU'
Wrong Spelling:  cl-ou-stra 
Correct Spelling:  cl-au-stra 
Check more misspelled words of Claustra to spell it correct.

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