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tantalum

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈtæntələm/US:USA pronunciation: respellingUSA pronunciation: respelling(tan′tl əm)

tan•ta•lum (tan′tl əm),USA pronunciation n. [Chem.]

Chemistrya gray, hard, rare, metallic element occurring in columbite and tantalite and usually associated with niobium: used, because of its resistance to corrosion by most acids, for chemical, dental, and surgical instruments and apparatus. Symbol: Ta;
at. wt.: 180.948;
at. no.: 73;
sp. gr.: 16.6.

Neo-Latin; named after Tantalus
1795–1805

Collins Concise English Dictionary © HarperCollins Publishers::

tantalum /ˈtæntələm/ n

a hard greyish-white metallic element that occurs with niobium in tantalite and columbite: used in electrical capacitors in most circuit boards and in alloys to increase hardness and chemical resistance, esp in surgical instruments. Symbol: Ta; atomic no: 73; atomic wt: 180.9479; valency: 2, 3, 4, or 5; relative density: 16.654; melting pt: 3020°C; boiling pt: 5458±100°C

Etymology: 19th Century: named after Tantalus, with reference to the metal's incapacity to absorb acids

'tantalum' also found in these entries (note: many are not synonyms or translations):

Ta - tantalite - columbite - niobium - tantalic - tantalous

In Lists: Elements in the periodic table, more...

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tantalum