noun. ['ˈθæliːəm'] a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores.
- atomic number 81
- zinc blende
- θαλλός (Ancient Greek (to 1453))
Rhymes with Thallium
Sentences with thallium
1. Noun, singular or mass
It's worth noting that toxins such as mercury, lead and thallium can damage the kidneys; tuna and other fish can contain all three heavy metals.