mean life
noun Physics.
the average time that an unstable particle or nucleus survives before it decays.
Also called
average life,
lifetime.
Words nearby mean life
British Dictionary definitions for average life
mean life
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
Symbol: τ