Pronunciation: ˈfjuːmɪŋ sʌlˈfjʊərɪk ˈasɪd
Parts of Speech: noun
inorganic chemistry a highly corrosive solution of sulphur trioxide in sulphuric acid
Definition: Meaning of, once in a blue moon in English to English dictionary.
Pronunciation: / wʌns ɪn eɪ bluː muːn /