hafnium /'hæfniәm/ 📖 中文释义 n. 铪[化] 铪 📘 English Definition(英文释义) n. a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons ← hafnifluoride H 字母词表 hafnium carbide →