coltan

World English Dictionary
coltan (ˈkɒlˌtæn)
 
n
a metallic ore found esp in the E Congo, consisting of columbite and tantalite (a source of the element tantalum)
 
[C20: from columbite + tantalite]

Collins English Dictionary - Complete & Unabridged 10th Edition
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WordNet
coltan

noun
a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips [syn: columbite-tantalite
WordNet® 3.0, © 2006 by Princeton University.
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