extremely high frequency extremely • extremely low frequency · · · Info · Definitions · Synonyms · Characters · · extremely high frequency · · Text Common · · Latin · · Scripts 24 · · Length 8 · · Syllables Definitions · · · (noun) 30 to 300 gigahertz. Synonyms: extremely high frequency, EHF. · · Noun Definition 1 Synonyms · · · ehf · · Synonym 1 Characters · · space U+0020 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E q latin small letter q U+0071 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 x latin small letter x U+0078 y latin small letter y U+0079