niobite

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

• noun Columbite.

from The Century Dictionary.

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

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