Average life



mean life.
the average time that an unstable particle or nucleus survives before it decays.
decay time.
Contemporary Examples

From 1900 to 1950, average life expectancy at birth rose from 47.3 years to 68.2 years, and up to 78.7 years in 2010.
Want Hope in 2014? Forget Politics, Focus on Energy and Medicine Lloyd Green December 30, 2013

Keep in mind that the average life expectancy of an American is 78.
Colbert Is Ivy League TV Compared to Fox News Dean Obeidallah June 2, 2014

Corrections officers commit suicide at alarmingly high rates and their average life expectancy is fifty-eight years.
Detention Worker Stands Up for Prisoners’ Rights Moral Courage March 11, 2014

Raise the retirement age, indexed to average life expectancy.
A Centrist Gets Fighting Mad Mark McKinnon October 12, 2010

The number is the average life expectancy for a population, which has a huge range within it.
Online Mortality Calculator Could Change Health Care—and Our Views on Death Josh Dzieza January 14, 2012

Historical Examples

In my judgment, nations, like individuals, have an average life.
The Works of Robert G. Ingersoll, Vol. 5 (of 12) Robert G. Ingersoll

With us the average life is enchanting, the normal is the exquisite.
Imaginary Interviews W. D. Howells

The higher and better qualities of the soul have more to do with the average life.
The Works of Robert G. Ingersoll, Vol. 8 (of 12) Robert G. Ingersoll

In the average life the realm of joy is larger than the realm of sorrow.
The Bible and Life Edwin Holt Hughes

We then proceeded to ascertain the average life of those included in it.
The Atlantic Monthly, Volume 16, No. 96, October 1865 Various

noun
(physics) the average time of existence of an unstable or reactive entity, such as a nucleus, elementary particle, charge carrier, etc; lifetime. It is equal to the half-life divided by 0.693 15 τ

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