The word Peritoneium is misspelled against Peritonaeum, a noun meaning "Same as Peritoneum."
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Peritonaeum has vowels 'ae' together mispronounced as 'ei'
Word contains consecutive vowels 'AE' in between alphabets periton & um is misspelled as 'EI'
Wrong Spelling:  periton-ei-um 
Correct Spelling:  periton-ae-um 
Check more misspelled words of Peritonaeum to spell it correct.