Hf

📖 中文释义

  1. [医] 铃(72号元素)
📘 English Definition（英文释义）
  1. 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
  2. n 3 to 30 megahertz
H 字母词表