| 释义 |
haf·ni·um
\ˈhafnēəm\ noun
(-s)
Etymology: New Latin, from Hafnia (Copenhagen), Denmark
: a high-melting gray tetravalent metallic element closely resembling zirconium chemically, occurring in most zirconium minerals, and useful because of its ready emission of electrons (as in filaments for incandescent lamps) — symbol Hf; see element table |