half-life
半衰期,半生,半期,半年
Definitions
- 1
plural half-lives [haf-lahyvz, hahf-]. /ˈhæfˌlaɪvz, ˈhɑf-/.
- : Physics. the time required for one half the atoms of a given amount of a radioactive substance to disintegrate.
- : Also called biological half-life .Pharmacology. the time required for the activity of a substance taken into the body to lose one half its initial effectiveness.
- : Informal. a brief period during which something flourishes before dying out.
Examples
Eric Garcetti succeeded Villaraigosa and has received high marks in his first year and a half on the job.
His life as a man is built around health insurance and tax services.
It was also an attack on our freedom of expression and way of life.
I always wanted my life to be that way, and it became that way.
My dad was a sailor, and all through my childhood he was away half of the time at sea, and to an extent I have a similar job.
It is the principal waste-product of metabolism, and constitutes about one-half of all the solids excreted—about 30 gm.
A small book, bound in full purple calf, lay half hidden in a nest of fine tissue paper on the dressing-table.
Now, it immediately occurred to Davy that he had never in his whole life had all the plums he wanted at any one time.
Hilda, trembling at the door, more than half expected Mr. Orgreave to say: "You mean, she's invited herself."
Dean Swift was indeed a misanthrope by theory, however he may have made exception to private life.