HF





Definition:

  1. [noun] a gray tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
    Synonyms: hafnium, Hf, atomic number 72

  2. [noun] 3 to 30 megahertz
    Synonyms: high frequency, HF

Synonyms: