mean life

noun

, Physics.

1. the average time that an unstable particle or nucleus survives before it decays.
2. decay time.

mean life

noun

1. 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

Example Sentences

“That is hugely significant, because if that happens twice in our solar system, it could mean life is really common,” he says.

From BBC

Collins said she was appalled to see online trolling from "armchair admirals, people who will never have to make decisions which mean life or death for their subordinates".

From BBC

In a 1980 interview, a 34-year-old Trump describes politics as "a very mean life" and says "the most capable people" instead choose the business world.

From BBC

The band’s name, Seera, can mean “life” or “biography” in Arabic.

From Seattle Times

“It could mean life or death,” McDuffie said.

From Seattle Times