epact /ēˈpakt/

1. The moon's age at the beginning of the year
2. The excess of the calendar month or solar year over the lunar

• trace fossil
• trace fossils
• trace-horse
• trace-horses
• traceless
• tracelessly
• tracer
• tracer bullet
• tracer bullets
• tracer element
• traceried
• traceries
• tracers
• tracer shell
• tracer shells
• tracery
• traces
• traceur
• traceurs
• trachea
• tracheae
• tracheal
• Trachearia
• trachearian
• trachearians