单词 | thallium |
释义 | thallium/ˈθalɪəm![]() noun [mass noun] The chemical element of atomic number 81, a soft silvery-white metal which occurs naturally in small amounts in iron pyrites, sphalerite, and other ores. Its compounds are very poisonous. (Symbol: Tl) However, water-soluble rubidium, cesium, thallium, and silver minerals are virtually nonexistent and should pose no complication....
OriginMid 19th century: modern Latin, from Greek thallos 'green shoot', because of the green line in its spectrum. Rhymes |
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