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Definition of Life expectancy

Babylon English

average number of years a person can expect to live
Life expectancy Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

life expectancy
n : an expected time to live as calculated on the basis of statistical probabilities

WordNet 2.0

1. an expected time to live as calculated on the basis of statistical probabilities
(hypernym) anticipation, expectancy
Life expectancy Definition from Business & Finance Dictionaries & Glossaries
Campbell R. Harvey's Hypertextual Finance Glossary
The length of time that an average person is expected to live, which is used by insurance companies to make projections of benefit payouts.
Copyright © 2000, Campbell R. Harvey. All Rights Reserved.
Life expectancy Definition from Social Science Dictionaries & Glossaries
Glossary of Sociology
The number of years a newborn in a particular society can expect to live. Also refers to the number of further years which people at any given age can, on average, expect to live.
Life expectancy Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Life expectancy is a statistical measure of how long an organism may live, based on the year of their birth, their current age and other demographic factors including sex. At a given age, life expectancy is the average number of years that is likely to be lived by a group of individuals (of age x) exposed to the same mortality conditions until they die. The most commonly used measure of life expectancy is life expectancy at age zero; that is, at birth (LEB), which can be defined in two ways: while cohort LEB is the mean length of life of an actual birth cohort (all individuals born a given year) and can be computed only for cohorts that were born many decades ago, so that all their members died, period LEB is the mean length of life of a hypothetical cohort assumed to be exposed since birth until death of all their members to the mortality rates observed at a given year.

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Life expectancy Definition from Medicine Dictionaries & Glossaries
EUFIC Nutrition Glossary
Expected further number of years of life measured at any age.
Copyright © 2006, EUFIC - European Food Information Council. All rights reserved.
Hepatitis Central (TM) Liver Disease Medical Glossary
Longevity, the average length of life of individuals in a population