The correct spelling for the word "Mercamine" is /ˈmɜːrkəmiːn/. The word comes from the Latin "mercurius" meaning "mercury" and "ammonia" meaning "ammonia", and refers to a compound containing both of these elements. The "e" in the second syllable indicates a long "e" sound, while the "a" in the third syllable is pronounced as "uh". Proper spelling is crucial in scientific fields like chemistry, where errors can have grave consequences.