vicennial /vī-senˈyəl/

1. Lasting, or coming at the end of, twenty years
2. Occurring every twenty years

• indicia
• indicial
• indicium
• indicolite
• equifinality
• equifinally
• equilateral
• equilibrate
• equilibrated
• equilibrates
• equilibrating
• equilibration
• equilibrations
• equilibrator
• equilibrators
• equilibria
• equilibrial
• equilibrist
• equilibrists
• equilibrities
• equilibrity
• equilibrium
• equilibriums
• equimultiple
• equimultiples