- 1. n. A mineral of a black color, submetallic luster, and high specific specific gravity. It is a niobate (or columbate) of iron and manganese, containing tantalate of iron; -- first found in New England. Source: opted
- 2. n. a black mineral that is an ore of niobium and tantalum Source: wordnet
- 3. A mineral of a black color, submetallic luster, and high specific specific gravity. It is a niobate (or columbate) of iron and manganese, containing tantalate of iron; -- first found in New England. Source: webster
- 4. A mineral of a black color, submetallic luster, and highspecific specific gravity. It is a niobate (or columbate) of iron andmanganese, containing tantalate of iron; -- first found in NewEngland. Source: adambom
- 5. n a black mineral that is an ore of niobium and tantalum Source: ecdict
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ironblackmineralspecificcolumbatecolorcontainingfirstfoundgravitylusterniobatesubmetallictantalateEnglandhighmanganesenewniobiumoretantalum