Metheymoglobin or Methaemoglobin: How To spell?
The word Metheymoglobin is misspelled against Methaemoglobin, a noun meaning "A stable crystalline compound obtained by the decomposition of hemoglobin. It is found in old blood stains."
Methaemoglobin has vowels 'ae' together mispronounced as 'ey'Word contains consecutive vowels 'AE' in between alphabets meth & moglobin is misspelled as 'EY'
Wrong Spelling:  meth-ey-moglobin  Correct Spelling:  meth-ae-moglobin 
Find more incorrect spellings of Methaemoglobin to spell right way.