BioScience Dictionary

 
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Found Biological half-life 2 times.

Displaying results 1 to 10.

1. Biological half-life
The amount of time it takes the body to eliminate half of the amount of a chemical after it has been absorbed by the body.

2. Biological half-life (t 1/2)
This is the time required for one-half of the total amount of a particular substance in a biological system to be consumed or broken down by biological processes when the rate of removal is approximately exponential. Toxic chemicals with a long biological half-life (such as some pesticide s) will tend to accumulate in the body and are, therefore, more likely to be harmful. A substance with a short biological half-life may still accumulate if a portion of it it becomes tightly bound to bone or other tissues, even if most of it is quickly cleared from the body.