HYDRIODIC ACID Meaning of HYDRIODIC ACID in English [ ˌhʌɪdrɪ'ɒdɪk , -ʌɪ'ɒdɪk ]■ noun Chemistry a strongly acidic solution of the gas hydrogen iodide. [HI.] Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004