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1. (n.) tantalum
a hard, gray, rare metallic element that resists corrosion by most acids: used for chemical, dental, and surgical instruments.
Etymology: (< Sw (1802); after Tantalus , alluding to the nonabsorption of acids)
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| Definition of 'tantalum' |
Princeton's WordNet |
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1. (noun) tantalum, Ta, atomic number 73
a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
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Webster Dictionary |
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1. (noun) tantalum
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
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| Definition of 'tantalum' |
U.S. National Library of Medicine |
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1. tantalum
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)
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Definitions of tantalum 
