Dictionary   FastHealth  Email This!

 


half-life

n :  the time required for half of something to undergo a process: as  a  :  the time required for half of the atoms of a radioactive substance to become disintegrated  b  :  the time required for half the amount of a substance (as a drug or radioactive tracer) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes <the serum is about 2 days -Jour. Amer. Med. Assoc.>  .
 
 

 
Published under license with Merriam-Webster, Incorporated.  © 1997-2017.







               



               



Rangely District Hospital (Rangely, Colorado - Rio Blanco County)