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Multilingual Demographic Dictionary, second unified edition, English volume

Life span

Multilingual Demographic Dictionary, second unified edition, English vol.
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Life span  (LIFE span)


The median length of life 1 sometimes called the probable length of life 1 is the age at which half the original cohort of births have died. After infancy the distribution of deaths by age in the life table will usually have a mode and the corresponding age is called the modal age at death 2, or sometimes the normal age at death 2. It may be of interest as an indicator of human longevity 3 or the length of life 3 corresponding more closely to the sense in which the term is used in everyday language than either the average (433-4) or the median length of life. The term life span 4 is used to refer to the maximum possible length of human life. More...