hafnium hafiz • hafnyl · · · Info · Definitions · Synonyms · Characters · · hafnium · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons. Synonyms: Hf, atomic number 72. · · Noun Definition 1 Synonyms · · · hf · · Synonym 1 atomic number 72 · · Synonym 2 Characters · · a latin small letter a U+0061 f latin small letter f U+0066 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E u latin small letter u U+0075