1. A period of three years

Derived forms: triennia, trienniums

• representative sampling
• represented
• representer
• repress
• repressed
• represser
• repressible
• repressing
• repression
• repressive
• repressiveness
• repressor
• repressor gene
• superlative degree
• superlatively
• superload
• superlunar
• superlunary
• superman
• supermarket
• supermarketeer
• supermarketer
• Supermex
• supermodel
• supermolecule