hf (Polish)

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hf

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:

• hafnium
• Hf
• atomic number 72

Noun

3 to 30 megahertz

Synonyms:

• high frequency
• HF