a 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; atomic weight: 180.948; atomic number: 73; specific gravity: 16.6.
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
tantalum tan·ta·lum (tān’tə-ləm)
A hard heavy metallic element that is exceptionally resistant to chemical attack below 150°C and is used to make electronic components and surgical instruments. Atomic number 73; atomic weight 180.948; melting point 3,017°C; boiling point 5,458°C; specific gravity 16.7; valence 2, 3, 4, 5.
A hard, heavy, gray metallic element that is highly resistant to corrosion at low temperatures. It is used to make light-bulb filaments, surgical instruments, and glass for camera lenses. Atomic number 73; atomic weight 180.948; melting point 2,996°C; boiling point 5,425°C; specific gravity 16.6; valence 2, 3, 4, 5. See Periodic Table.
noun, plural Tantaluses for 2. 1. Classical Mythology. a Phrygian king who was condemned to remain in Tartarus, chin deep in water, with fruit-laden branches hanging above his head: whenever he tried to drink or eat, the water and fruit receded out of reach. 2. (lowercase) Chiefly British. a stand or rack containing visible decanters, […]
[tan-tl-uh s] /ˈtæn tl əs/ noun 1. a long-tailed African monkey, Cercopithecus tantalus (or C. aethiops tantalus), of central African grasslands, having a long face framed by upswept whiskers.
adjective 1. equivalent, as in value, force, effect, or signification: His angry speech was tantamount to a declaration of war. adjective 1. (postpositive) foll by to. as good (as); equivalent in effect (to): his statement was tantamount to an admission of guilt
noun 1. a blast of a trumpet or horn. 2. any similar sound. noun 1. a blast, as on a trumpet or horn