| / English Dictionary |
HF
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
3 to 30 megahertz
Synonyms:
HF; high frequency
Classified under:
Nouns denoting attributes of people and objects
Hypernyms ("HF" is a kind of...):
radio frequency (an electromagnetic wave frequency between audio and infrared)
Holonyms ("HF" is a part of...):
electromagnetic spectrum (the entire frequency range of electromagnetic waves)
Sense 2
Meaning:
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:
atomic number 72; hafnium; Hf
Classified under:
Hypernyms ("Hf" is a kind of...):
metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)
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