👉 Centennia is a term used in ancient Greek culture and philosophy to describe the period of life from birth until death. It was a measure of time that was based on the length of one's lifetime, with each year being equivalent to 10 years. Centennia were often used to indicate the age at which someone would reach adulthood or the end of their lifespan. The term was also associated with the concept of life and its cycles, as it was believed that a person's life span