English dictionary

columbite

/k/@/'l/@/mb/aI/t/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

a black mineral that is an ore of niobium and tantalum

noun.substance

Synonyms niobite

Source: WordNet 3.0
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.

noun

Source: webster1913