Pertaining to the period of time before the catastrophic eruption of Thea, about 1600-1500 BCE, the resultant tsunamis of which are believed to have caused the downfall of the Minoan civilization. This event is thought by many to be the basis of Plato's story of Atlantis. The word literally means "before the flood." From the Latin ante (before) + diluvium (flood).
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.