ISOCHEIM Meaning of ISOCHEIM in English [ 'ʌɪsə(ʊ)kʌɪm ]■ noun Meteorology a line on a map connecting points having the same average temperature in winter.OriginC19: from iso- + Gk kheima 'winter weather'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004