tantalum


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tan·ta·lum

 (tăn′tə-ləm)
n. Symbol Ta
A very hard, dense, gray metallic element that occurs chiefly in columbite-tantalite and is exceptionally resistant to chemical attack below 150°C. It is used to make electrolytic capacitors for portable electronic and computing devices; superalloys for aircraft, missile, and nuclear reactor parts; filaments; and surgical instruments. Atomic number 73; atomic weight 180.948; melting point 3,017°C; boiling point 5,458°C; specific gravity 16.4; valence 2, 3, 4, 5. See Periodic Table.

[New Latin, from Latin Tantalus, Tantalus (from its high resistance to absorbing acids even when immersed in them); see Tantalus.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

tantalum

(ˈtæntələm)
n
(Elements & Compounds) 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
[C19: named after Tantalus, with reference to the metal's incapacity to absorb acids]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

tan•ta•lum

(ˈtæn tl əm)

n.
a hard, gray, rare metallic element that resists corrosion by most acids: used for chemical, dental, and surgical instruments. Symbol: Ta; at. wt.: 180.948; at. no.: 73; sp. gr.: 16.6.
[< Swedish (1802); after Tantalus, alluding to the nonabsorption of acids]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

tan·ta·lum

(tăn′tə-ləm)
Symbol Ta A hard, heavy, gray metallic element that is highly resistant to corrosion at lower temperatures. It is used to make light-bulb filaments, surgical instruments, and glass for camera lenses. Atomic number 73. See Periodic Table.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tantalum - a hard grey lustrous metallic element that is highly resistant to corrosiontantalum - a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
fergusonite - a dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals
columbite, niobite - a black mineral that is an ore of niobium and tantalum
tantalite - a mineral consisting of tantalum oxide of iron and manganese that occurs with niobite or in coarse granite; an ore of tantalum
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
тантал
tantal
tantal
tantalo
tantaal
tantaali
tantal
tantál
tantal
タンタル
tantalas
tantaaltantalium
tantal
tantal
tantal
tantal
tantal
tantal
tantal
тантал
tantalitantan

tantalum

n tantalio
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
This property has exploration and commercialisation (export) permits in place for tin, gold, tantalum and niobium.
These state-of-art MIL-qualified wet tantalum capacitors are widely used in avionics applications where high performance and extreme reliability are required.
Overall, Homestead had a total indicated and inferred resource of 119,100 tonnes and an average grade of 237 parts per million of tantalum oxide and 3,875 parts per million of lithium oxide.
Tantalum's Connected Car platform provides an end-to-end cloud based solution and an open marketplace for aggregation and monetization of vehicle-related services.
For comparison, the nanocrystalline pure tantalum was made using high-energy ball-milling (HEBM) and PPS.
Tantalum's solution works by connecting to a car's on-board computer to provide real-time information about how much nitrogen oxide (NOX) is being emitted.
Dr Marc Stettler from Imperial College London, which is helping Tantalum develop and test its software, said: We are very excited to be involved in the Air.Car project, as it illustrates how Imperial's research expertise and world-class facilities can deliver practical and real-world solutions to the environmental problems facing our rapidly growing cities.
A set of tantalum samples with Plasma Electrolytic Oxidation (Micro Arc Oxidation) served for the study.
The metal tantalum is uncommon, making up less than two ten-thousandths of a percent of the mass of Earth's crust.
A large portion of the world's tantalum Is mined in the Democratic Republic of Congo.