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thal·li·um
 thallium
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- pronunciation:
- thae
li
 m
- features:
- Word Combinations (noun)
| part of speech: |
noun |
| definition: |
a chemical element that has eighty-one protons in each nucleus and that can be isolated as a soft easily corroding toxic metal whose sulfate salt is sometimes used as a pesticide. (symbol: Tl)
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