Meaning of THALLIUM
| Pronunciation: | | 'thaleeum
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 WordNet Dictionary |
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| | Definition: | | [n] a soft gray 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 |
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| | Synonyms: | | atomic number 81, Tl |
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| | See Also: | | blende, metal, metallic element, sphalerite, zinc blende | |
| Webster's 1913 Dictionary |
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| | Definition: | | \Thal"li*um\, n. [NL., fr. Gr. ? young or green shoot
or branch, twig. So called from a characteristic bright green
line in its spectrum.] (Chem.)
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.
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