ISOHYET Meaning of ISOHYET in English [ ˌʌɪsə(ʊ)'hʌɪɪt ]■ noun Meteorology a line on a map connecting points having the same amount of rainfall.OriginC19: from iso- + Gk huetos 'rain'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004