1. A soft grey malleable metallic element that resembles tin but discolours on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores
   - thallium, atomic number 81

Type of: metal, metallic element

Part of: blende, sphalerite, zinc blende

Encyclopedia: Tl

• laciniate
• lack
• lackadaisical
• lackadaisically
• lackaday
• lackey
• lacking
• lackluster
• lacklustre
• Laconia
• Laconian
• laconic
• laconically
• laconicism
• laconism
• lacquer
• lacquer tree
• lacquerware
• lacquey
• head nurse
• head of hair
• head of household
• head of state
• head off
• head over heels