Found 2 items, similar to tantalum.
English → English (WordNet) Definition: tantalum tantalum n : a hard gray lustrous metallic element that is highly corrosion-resistant; occurs in niobite and fergusonite and tantalite [syn: Ta, atomic number 73]
English → English (gcide) Definition: Tantalum Tantalum \Tan"ta*lum\, n. [NL. So named on account of the perplexity and difficulty encounterd by its discoverer (Ekeberg) in isolating it. See Tantalus.] (Chem.) A rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. Symbol Ta. Atomic weight 182.0. Formerly called also tantalium. [1913 Webster]