heat rash heat pump • heat ray · · · Info · Definitions · Synonyms · Characters · · heat rash · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) obstruction of the sweat ducts during high heat and humidity. Synonyms: prickly heat, heat rash, miliaria. · · Noun Definition 1 Synonyms · · · prickly heat · · Synonym 1 miliaria · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074