'Tantalite' definitions:
Definition of 'tantalite'
From: WordNet
noun
A mineral consisting of tantalum oxide of iron and manganese that occurs with niobite or in coarse granite; an ore of tantalum
Definition of 'Tantalite'
From: GCIDE
- Tantalite \Tan"ta*lite\, n. [Cf. F. tantalite.] (Min.) A heavy mineral of an iron-black color and submetallic luster. It is essentially a tantalate of iron. [1913 Webster]