1 文書を見つけるための辞書。

• thallium, atomic number 81, tl
• タリウム
• 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
• スズに似ているが、空気に触れると変色する、軟質で灰色の可鍛性の金属元素