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thallium
Definitions
[ˈθalɪəm], (Noun)
Definitions:
- the chemical element of atomic number 81, a soft silvery-white metal that occurs naturally in small amounts in pyrite and other ores. Its compounds are very poisonous
Phrases:
Origin
:
mid 19th century: modern Latin, from Greek thallos ‘green shoot’, because of the green line in its spectrum
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definition by Oxford Dictionaries