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




definition by Oxford Dictionaries