heat ray heat rash • heat-reducing · · · Info · Definitions · Characters · · heat ray · · Text Common · · Latin · · Scripts 8 · · Length 2 · · Syllables Definitions · · · (noun) a ray that produces a thermal effect. Synonyms: heat ray. · · Noun Definition 1 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 t latin small letter t U+0074 y latin small letter y U+0079