tantalum
n. வெம்மம், வெப்பத்தினால் திராவகச் செயற்பாட்டினாலும் பாதிக்கப்படாத வௌளை உலோகத் தினம வகை.
Tan"ta*lum, n. Etym: [NL. So named on account of the perplexity and difficulty encounterd by its discoverer (Ekeberg) in isolating it. See Tantalus.] (Chem.) Defn: 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.