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.]

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.

technetium

(tɛkˈniːʃɪəm)

(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]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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.

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:

Noun

technetium - a crystalline metallic element not found in nature; occurs as one of the fission products of uranium

atomic number 43, Tc

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

Technetium

tecnecio

tehneetsium

technetium

technétium

tehnecij

technécium

teknetín

tecnetotecnezio

テクネチウム

technecis

technetium

technetium

technet

tecnécio

techneţiu

технеций

technécium

tehnecij

teknetium

teknetyum

technetium

[tekˈniːʃɪəm] N → tecnetio m

Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

tech·ne·ti·um

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

English-Spanish Medical Dictionary © Farlex 2012

technetium

n tecnecio

Mentioned in

References in periodicals archive

"Iran now exports technetium generator (or colloquially a technetium cow or moly cow, a device used to extract the metastable isotope 99mTc of technetium from a source of decaying molybdenum-99) to many countries and if we can produce molybdenum, we will become fully self-sufficient in this area and of course, today we have had many successes in radio medicine production technology," Saqari said.

Iran Boasts 3.3% Rise in Medicine Production

Technetium 3, 3-diphosphono-1, 2-propanodicarboxylic acid (TcDPD99) imaging is widely used worldwide and proved to have a high sensitivity and specificity for ATTR-CA with a high negative predictive value (NPV) of 100% for ruling out AL-CA and positive predictive value (PPV) of 88% for ATTR-CA.

Bone scintigraphy for early detection of transthyretin cardiac amyloidosis

Preparation and evaluation of modified composition for lyophilized kits of [Cu[(MIBI).sub.4]][BF.sub.4] for [[sup.99m]Tc] technetium labeling.

Alternative chromatographic system for the quality control of lipophilic technetium-99m radiopharmaceuticals such as [[[sup.99m]Tc[(MIBI).sub.6]].sup.+]

Astronomers were especially surprised to identify technetium in S stars' spectra, in 1952.

Weird R gem climbs to maximum

The latter group merit close clinical follow-up and possibly a technetium Tc 99m succimer renal scan.

Two factors plus a test best predict renal scarring in UTI patients

The two most commonly used localization modalities include ultrasonography and technetium Tc 99m sestamibi scan.

Parathyroid FNA and hormone assay

Rhodes and her associates are running MBI scans on women who have received a dose of technetium 99m sestamibi for cardiac imaging.

Molecular imaging needs lower radiation dose

An anterior-posterior technetium bone scan provides a window into the metabolic activity of living bone, according to Dr.

Use x-rays plus scintigraphy to assess knee OA

Since technetium is taken up and trapped by the thyroid gland, it is essential to image the thyroid gland at 30 minutes to confirm that the binding of albumin to the technetium is good.

Protein-losing enteropathy demonstrated on Tc-99m HSA

Although most of the company's manufacturing has been moved to its facility in Oslo, Norway, its Ceretec (technetium 99m exametazime) product cannot be produced in GE's other manufacturing sites because of production and regulatory issues.

Flood causes GE Healthcare to halt Ceretec production

Nuclear stress testing, involving injections of radioactive materials such as thallium and technetium, can raise the exposure to about twice that of CT angiography.

X-ray danger: get the big picture: your cumulative radiation dose is growing. Do you really need to add to it?

In 2000, USEC discovered that 9,550 metric tons of that inventory may have contained elevated levels of technetium, making it out-of-specification according to standards for uranium hexafluoride for enrichment as set by the American Society for Testing and Materials.

USEC Completes Cleanup of Contaminated Uranium Inventories