a metallic chemical element found with, and similar to, zirconium: used in the manufacture of light-bulb filaments and in reactor control rods: symbol, Hf; at. no., 72 see the periodic table of elements in the Reference Supplement
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'hafnium'
ModL: so named (1923) by D. Coster (1889-1950), Du chemist, and G. C. de Hevesy (c.
1889-1966), Hung chemist, after Hafnia
, Latinized name of Dan København
, where it was discovered + -ium