1. An alloy of iron and nickel having a low coefficient of thermal expansion; used in tuning forks and measuring tapes and other instruments

Type of: alloy, metal

Encyclopedia: Invar

• Prostigmin
• prostitute
• prostitution
• prostitutor
• prostrate
• prostration
• prostyle
• prosumer
• prosy
• protactinium
• protagonism
• protagonist
• protamine
• protanopia
• protanopic
• protasis
• protea
• Protea cynaroides
• protea family
• Protea mellifera
• Proteaceae
• Proteales
• protean
• protease
• protease inhibitor