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Longevity escape velocity
Increasing remaining life expectancy faster than time passes / From Wikipedia, the free encyclopedia
In the life extension movement, longevity escape velocity (LEV), actuarial escape velocity[2] or biological escape velocity[3] is a hypothetical situation in which one's remaining life expectancy (not life expectancy at birth) is extended longer than the time that is passing. For example, in a given year in which longevity escape velocity would be maintained, medical advances would increase people's remaining life expectancy more than the year that just went by.
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The term is meant as an analogy to the concept of escape velocity in physics, which is the minimum speed required for an object to indefinitely move away from a gravitational body despite the gravitational force pulling the object towards the body.