niobite nio·bite US/ˈnaɪoʊˌbaɪt/ uncommon noun 1. a black mineral that is an ore of niobium and tantalum Synonymscolumbite Related words Broader terms mineral Part of niobiumtantalum WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.
