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, Tl

Type of: metal, metallic element

Part of: blende, sphalerite, zinc blende

• freshwater cordgrass
• freshwater eel
• freshwater fish
• freshwater limpet
• freshwater mussel
• Fresnel
• Fresnel lens
• Fresno
• fress
• fret
• fretful
• fretfully
• fretfulness
• fretsaw
• fretted
• fretwork
• Freud
• Freudian
• Freudian psychology
• Freudian slip
• Frey
• Freya
• Freyja
• Freyr
• FRG