thalliumnoun [ U ]
uk/ˈθæl.i.əm/us/ˈθæl.i.əm/a very poisonous chemical element used in photocells, and used as poison in the past
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Chemical elements
- alkali metal
- antimony
- calcium
- carbonic
- carbonic acid
- cesium
- cl
- graphene
- lithium
- molybdenum
- nickel
- quicksilver
- sodium
- strontium
- sulphur
- transition metal
- tungsten
- urea
- vanadium
- zinc
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