from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A lustrous, grayish-white, strong, ductile metallic element obtained primarily from zircon and used chiefly in ceramic and refractory compounds, as an alloying agent, and in nuclear reactors as a highly corrosion-resistant alloy. Atomic number 40; atomic weight 91.22; melting point 1,852°C; boiling point 4,377°C; specific gravity 6.56 (20°C); valence 2, 3, 4. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a metallic chemical element (symbol Zr) with an atomic number of 40.
from the GNU version of the Collaborative International Dictionary of English
- n. A rare element of the carbon-silicon group, intermediate between the metals and nonmetals, obtained from the mineral zircon as a dark sooty powder, or as a gray metallic crystalline substance. Symbol Zr. Atomic weight, 90.4.
from The Century Dictionary and Cyclopedia
- n. Chemical symbol, Zr; atomic weight, 89.6. The metal contained in zirconia.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon
From a New Latin coinage, from zircon. (Wiktionary)