Online dictionaryOnline dictionary
Synonyms, antonyms, pronunciation

  Home
English Dictionary      examples: 'day', 'get rid of', 'New York Bay'




Half-life   /hæf-laɪf/   Listen
Half-life

noun
1.
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).  Synonym: half life.






WordNet 3.0 © 2010 Princeton University








Advanced search
     Find words:
Starting with
Ending with
Containing
Matching a pattern  

Synonyms
Antonyms
Quotes
Words linked to  

only single words



Share |
Add this dictionary
to your browser search bar





"Half-life" Quotes from Famous Books



... Willows said. "Half-life forty-six point five days. Beta and gamma emitter. Converts to Thallium ...
— The Bramble Bush • Gordon Randall Garrett

... she was left lamenting in her indigence. There, it was a father who had been engulfed in the roost; or again, the illness of a mother had cast a blight for years upon this other household. Sometimes I have seen two old people, all their sons dead, living a kind of stupefied half-life, automatically moving about, poor and wretchedly clad, unable to understand anything except the welcome heat of the sun and the animal comfort of a little food. There are many sad things in this world: none is more sad than the sight of two old people outliving ...
— Literary Tours in The Highlands and Islands of Scotland • Daniel Turner Holmes



Copyright © 2025 Dictionary One.com