Noun
the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
Source: WordNethalf life
There are times when it will go so wrong that you will barely be alive, and times when you realise that being barely alive, on your own terms, is better than living a bloated half-life on someone else's terms. Jeanette Winterson
The half-life of love is forever. Junot Diaz
There are many different kinds of radioactive waste and each has its own half-life so, just to be on the safe side and to simplify matters, I base my calculations on the worst one and that's plutonium. David R. Brower
I could draw Bloom County with my nose and pay my cleaning lady to write it, and I'd bet I wouldn't lose 10% of my papers over the next twenty years. Such is the nature of comic-strips. Once established, their half-life is usually more than nuclear waste. Berkeley Breathed
110 Zr, the heaviest isotope of zirconium, is the most radioactive, with an estimated half-life of 30 milliseconds. Source: Internet
149 Dy has two metastable isomers, the second of which, 149m2 Dy, has a half-life of 28 ns. Source: Internet