niobite

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Columbite.

from The Century Dictionary.

• noun Same as columbite.
• noun One of a branch of Monophysites, founded by Stephanus Niobes in the sixth century, who opposed the views of the Severians (see Severian).

from the GNU version of the Collaborative International Dictionary of English.

• noun (Min.) Same as columbite.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The mineral columbite.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a black mineral that is an ore of niobium and tantalum