1. A hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
   - Ta, atomic number 73

Derived forms: tantalums

Type of: metal, metallic element

Part of: columbite, fergusonite, niobite, tantalite

Encyclopedia: Tantalum

• ophidism
• Ophiodon
• Ophiodon elongatus
• Ophiodontidae
• Ophioglossaceae
• Ophioglossales
• Ophioglossum
• Ophioglossum pendulum
• ophiolatry
• Ophiophagus
• Ophiophagus hannah
• Ophisaurus
• ophite
• Ophiuchus
• Ophiurida
• Ophiuroidea
• ophryon
• Ophrys
• Ophrys apifera
• Ophrys insectifera
• Ophrys muscifera
• Ophrys sphegodes
• ophthalmectomy
• ophthalmia
• ophthalmia neonatorum