Pronucleu or Pronuclei: How To spell?

The word Pronucleu is misspelled against Pronuclei, which is plural of "Pronucleus"

Word ends with consecutive vowels 'EI' preceded by alphabets 'pronucl' is misspelled as 'EU'
Wrong Spelling:  pronucl-eu 
Correct Spelling:  pronucl-ei 
Check more misspelled words of Pronuclei to spell it correct.