- a soft gray malleable metallic factor that resembles tin but discolors on contact with air; it really is very harmful and is found in rodent and insect poisons; takes place in zinc blende plus some metal ores
- a soft gray malleable metallic element that resembles tin but discolors on experience of atmosphere; it's extremely harmful and it is found in rodent and pest poisons; happens in zinc blende many iron ores
Hypernym for "atomic number 81"
- metallic element
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