Definitions for tantalumˈtæn tl əm
Random House Webster's College Dictionary
tan•ta•lumˈtæn tl əm(n.)
a hard, gray, rare metallic element that resists corrosion by most acids: used for chemical, dental, and surgical instruments.
Ref: Symbol: Ta; 5
Origin of tantalum:
< Sw (1802); after Tantalus , alluding to the nonabsorption of acids
tantalum, Ta, atomic number 73(noun)
a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
A metallic chemical element (symbol Ta) with an atomic number of 73.
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
U.S. National Library of Medicine
Tantalum. A rare metallic element, atomic number 73, atomic weight 180.948, symbol Ta. It is a noncorrosive and malleable metal that has been used for plates or disks to replace cranial defects, for wire sutures, and for making prosthetic devices. (Dorland, 28th ed)