The word Preyoperculum is misspelled against Praeoperculum, a noun meaning "Same as Preoperculum."
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Praeoperculum has vowels 'ae' together mispronounced as 'ey'
Word contains consecutive vowels 'AE' in between alphabets pr & operculum is misspelled as 'EY'
Wrong Spelling:  pr-ey-operculum 
Correct Spelling:  pr-ae-operculum 
Check more misspelled words of Praeoperculum to spell it correct.