technetium

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tech·ne·ti·um

 (tĕk-nē′shē-əm, -shəm)
n. Symbol Tc
A silvery-gray radioactive metal, the first synthetically produced element, having isotopes with masses ranging from 85 to 118 and half-lives up to 4.2 million years. It is principally used as a tracer in a variety of medical applications. It is a remarkable inhibitor of corrosion in steel, but this use is limited because of radioactivity hazards. Atomic number 43; melting point 2,157°C; boiling point 4,265°C; specific gravity 11.50 (calculated); valence 0, 2, 4, 5, 6, 7. See Periodic Table.

[From Greek tekhnētos, artificial, from tekhnāsthai, to make by art, from tekhnē, art; see technical.]

technetium

(tɛkˈniːʃɪəm)
n
(Elements & Compounds) a silvery-grey metallic element, artificially produced by bombardment of molybdenum by deuterons: used to inhibit corrosion in steel. The radioisotope technetium-99m, with a half-life of six hours, is used in radiotherapy. Symbol: Tc; atomic no: 43; half-life of most stable isotope, 97Tc: 2.6 × 106 years; valency: 0, 2, 4, 5, 6, or 7; relative density: 11.50 (calculated); melting pt: 2204°C; boiling pt: 4265°C
[C20: New Latin, from Greek tekhnētos manmade, from tekhnasthai to devise artificially, from tekhnē skill]

tech•ne•ti•um

(tɛkˈni ʃi əm, -ʃəm)

n.
a synthetic element obtained in the fission of uranium or by the bombardment of molybdenum. Symbol: Tc; at. wt.: 99; at. no.: 43; sp. gr.: 11.5.
[1947; < Greek technēt(ós) artificial, literally, made, v. adj. of technâsthai, derivative of téchnē art, craft]

tech·ne·ti·um

(tĕk-nē′shē-əm)
Symbol Tc A silvery-gray, radioactive metallic element. It was the first element to be artificially made, and it is produced naturally in extremely small amounts during the radioactive decay of uranium. Technetium is used to remove corrosion from steel. Atomic number 43. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.technetium - a crystalline metallic element not found in naturetechnetium - a crystalline metallic element not found in nature; occurs as one of the fission products of uranium
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.
Translations
технеций
technecium
technetium
tehneetsium
technetium
technétium
tehnecij
technécium
teknetín
tecnetotecnezio
テクネチウム
technecis
technetium
technet
tecnécio
techneţiu
technécium
tehnecij
teknetium
teknetyum

technetium

[tekˈniːʃɪəm] Ntecnetio m

tech·ne·ti·um

n. tecnecio 99m., radioisótopo que emite rayos gamma, de uso frecuente en medicina nuclear.

technetium

n tecnecio
References in periodicals archive ?
Because technetium compounds are challenging to work with, earlier research has used less volatile substitutes to try to understand the material's behavior.