1. Coming next after the third and just before the fifth in position or time or degree or magnitude
   - fourth, quaternary

See also: ordinal

Encyclopedia: 4th

• ferricyanic acid
• ferricyanide
• ferriferous
• ferrimagnetism
• Ferris wheel
• ferrite
• ferritin
• ferro-
• ferrocerium
• ferroconcrete
• ferrocyanic acid
• ferrocyanide
• ferromagnetic
• ferromagnetism
• ferrous
• ferruginous
• ferrule
• ferry
• ferryboat
• ferrying
• ferryman
• fertile
• Fertile Crescent
• fertile period
• fertile phase