Cloustrum or Claustrum: How To spell?

The word Cloustrum is misspelled against Claustrum, a noun meaning "A thin lamina of gray matter in each cerebral hemisphere of the brain of man."

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

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