SINCE 1828
biological half-life
noun
variants:
or biologic half-life
Medical Definition of biological half-life
: the time that a living body requires to eliminate one half the quantity of an administered substance (as a radioisotope) through its normal channels of elimination
Comments on biological half-life
What made you want to look up biological half-life? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Words from Greek and Latin Quiz
-
- Which of the following months comes from a Latin word for “ten”?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share biological half-life
Resources for biological half-life