Hypoclaydiums or Hypocleidiums: How To spell?

The word Hypoclaydiums is misspelled against Hypocleidiums, which is plural of "Hypocleidium"

Word contains consecutive vowels 'EI' in between alphabets hypocl & diums is misspelled as 'AY'
Wrong Spelling:  hypocl-ay-diums 
Correct Spelling:  hypocl-ei-diums 
Check more misspelled words of Hypocleidiums to spell it correct.