Lexic.us

Definition of Thallium

1. Noun. 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.

Definition of Thallium

1. n. A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.

Definition of Thallium

1. Noun. a metallic chemical element (''symbol'' Tl) with atomic number 81. ¹

¹ Source: wiktionary.com

Definition of Thallium

1. a metallic element [n -S] : THALLIC, THALLOUS [adj]

Medical Definition of Thallium

1. A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7. Origin: NL, fr. Gr. Young or green shoot or branch, twig. So called from a characteristic bright green line in its spectrum. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Thallium

Literary usage of Thallium

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Dictionary of Chemistry and the Allied Branches of Other Sciences by Henry Watts (1869)
"thallium. _nd the clear solution evaporated to a small bulk. Sulphate of thallium then separates out on cooling, in long, clear, prismatic crystals. ..."

2. Journal of the American Chemical Society by American Chemical Society (1879)
"The thallium(I) salt (1) We gratefully acknowledge the financial support of ... They may alternatively be prepared by the use of thallium(I) hydroxide in ..."

3. The Chemical News and Journal of Industrial Science (1864)
"I know not whether there are thallium compounds which do not possess the property of developing the green spectral ray. I have not yet met with such ..."

4. Analytical Chemistry by Frederick Pearson Treadwell (1921)
"thallium is found in nature very sparingly; in small amount in many ... The principal source of thallium is the dust from sulfuric acid plants where pyrite ..."

5. Analytical Chemistry by Frederick Pearson Treadwell (1916)
"thallium is found in nature very sparingly; in small amount in many ... There are no characteristic thallium minerals. The principal sources of our thallium ..."

6. Select Methods in Chemical Analysis. (Chiefly Inorganic). by William Crookes (1871)
"The best method of separating silver and thallium, when together as ... Then heat with dilute sulphuric acid, which dissolves the thallium and leaves the ..."

7. A Treatise on Chemistry by Henry Enfield Roscoe, Carl Schorlemmer (1883)
"thallium, Tl = 203-6. 175 thallium was discovered in the year 1861 by ... thallium occurs in small quantities in many varieties of iron and copper pyrites, ..."

8. Report of the Annual Meeting (1864)
"On the Extraction of thallium on a large scale from the Flue-dust of ... Hop- kin and Williams, in the extraction of thallium from an amount of material far ..."

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