Malacostoen or Malacosteon: How To spell?

The word Malacostoen is misspelled against Malacosteon, a noun meaning "A peculiar disease of the bones, in consequence of which they become softened and capable of being bent without breaking."

Word contains consecutive vowels 'EO' in between alphabets malacost & n is misspelled as 'OE'
Wrong Spelling:  malacost-oe-n 
Correct Spelling:  malacost-eo-n 
Find more incorrect spellings of Malacosteon to spell right way.