Dictionary & Thesaurus

HF

1.	(noun) 3 to 30 megahertz
	Synonyms: high frequency
	Related Words: radio frequency

2.	(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: atomic number 72, hafnium
	Related Words: metal, metallic element