thal·li·um

(thăl′ē-əm)

n. Symbol Tl

A soft, malleable, highly toxic metallic element, used in photocells, infrared detectors, low-melting glass, and formerly in rodent and ant poisons. A radioactive isotope, Tl-201, is used in medical imaging. Atomic number 81; atomic weight 204.38; melting point 304°C; boiling point 1,473°C; specific gravity 11.85 (20°C); valence 1, 3. See Periodic Table.

[thall(o)- (from its green spectral line) + -ium.]

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.

thallium

(ˈθælɪəm)

(Elements & Compounds) a soft malleable highly toxic white metallic element used as a rodent and insect poison and in low-melting glass. Its compounds are used as infrared detectors and in photoelectric cells. Symbol: Tl; atomic no: 81; atomic wt: 204.3833; valency: 1 or 3; relative density: 11.85; melting pt: 304°C; boiling pt: 1473±10°C

[C19: from New Latin, from Greek thallos a green shoot; referring to the green line in its spectrum]

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

thal•li•um

(ˈθæl i əm)

n.

a soft, malleable, rare, bluish white metallic element: used in the manufacture of alloys and, in the form of its salts, in rodenticides. Symbol: Tl; at. wt.: 204.37; at. no.: 81; sp. gr.: 11.85 at 20°C.

[1861; < Greek thall(ós) green stalk + -ium²; after the green line in its spectrum]

thal·li·um

(thăl′ē-əm)

Symbol Tl A soft, easily shaped, very poisonous metallic element that has a low melting temperature. It is used in photography, in making low-melting and highly refractive glass, and in treating skin infections. Atomic number 81. 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

thallium - a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores

atomic number 81, Tl

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.

blende, sphalerite, zinc blende - an ore that is the chief source of zinc; consists largely of zinc sulfide in crystalline form

Translations

таллий

thallium

talio

tallium

תליום

talij

tallium

þallín

tallio

タリウム

thallium

talis

thallium

thallium

tal

tálio

taliu

таллий

thallium

talij

tallium

talyum

tali

thallium

[ˈθælɪəm] N → talio 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

thallium

n (Chem) → Thallium nt

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

thallium

n talio

Mentioned in

References in periodicals archive

We had no experience with thallium tomography but shortly alter we completed the first one we realized that planar cardiac imaging was a waste of time.

CLINICAL GATED CARDIAC SPECT

Differences in sensitivity between ETT with right precordial leads and thallium-201 scintigraphy were not statistically significant; neither were differences in specificity between the standard 12-lead ETT, ETT with the addition of right precordial leads, and thallium scintigraphy (88%).

INCORPORATING RIGHT PRECORDIAL LEADS IN EXERCISE ELECTROCARDIOGRAPHY

On January 27, the WHO representative in Iraq was notified that the laboratory had detected thallium qualitatively in patient specimens and the cake.

Thallium poisoning from eating contaminated cake--Iraq, 2008

In fact, arrogant Young had suggested thallium poisoning as a cause of the bug to the company doctor.

THE POISONER; EXCLUSIVE: Thallium victim remembers

Dr Bellingan added, 'We are now convinced that the cause of Mr Litvinenko's condition was not a heavy metal such as thallium.

Ex-Russian spy critical as poisoning saga deepens

"They could not have been caused by somewhat elevated levels of thallium that was found in his blood, said Mr Goldfarb.

Former Russian spy dies after heart attack

The Tyne Valley Action Group is objecting to the plans because of fears over harmful emissions of poisons such as dioxins, thallium and cadmium, which have been linked to cancer and birth defects.

Council attacked on waste burner

31 on suspicion of attempting to kill her 48-year-old mother at their home in the city of Izunokuni, Shizuoka Prefecture, by lacing her food with thallium, a substance often used as rat poison.

Court to open juvenile trial on girl suspected of poisoning mother

Although thallium (T1) is toxic to both humans and animals, there is little information on contamination in wildlife.

J Wildl Dis: Thallium contamination in wild ducks in Japan

In the present study we evaluated the association between urinary levels of cadmium, lead, barium, cobalt, cesium, molybdenum, antimony, thallium, and tungsten with PAD in a cross-sectional analysis of 790 participants [greater than or equal to] 40 years of age in NHANES 1999-2000.

Metals in urine and peripheral arterial disease

To get around that obstacle, Keimer and his colleagues spent months painstakingly hand-aligning small crystals of thallium barium copper oxide-a single-oxide-layer compound--and gluing them onto aluminum plates.

Magnetism piece fits no-resistance puzzle. (Physics)