Definitions for hafniumˈhæf ni əm, ˈhɑf-
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Random House Webster's College Dictionary
haf•ni•umˈhæf ni əm, ˈhɑf-(n.)
a toxic metallic element found in most zirconium minerals.
Category: Chemistry
Ref: Symbol: Hf 2
Origin of hafnium:
1923; < NL Hafn(ia) Copenhagen + -ium2
Princeton's WordNet
hafnium, Hf, atomic number 72(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
Wiktionary
hafnium(Noun)
a metallic chemical element (symbol Hf) with an atomic number of 72.
Origin: Hafnia, Copenhagen
U.S. National Library of Medicine
Hafnium
Hafnium. A metal element of atomic number 72 and atomic weight 178.49, symbol Hf. (From Dorland, 28th ed)
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