![](https://webarchive.library.unt.edu/eot2008/20081106182025im_/http://www.nci.nih.gov/images/spacer.gif) |
|
(OH-ver-ek-SPRES)
![](https://webarchive.library.unt.edu/eot2008/20081106182025im_/http://www.nci.nih.gov/images/spacer.gif)
| In biology, to make too many copies of a protein or other substance. Overexpression of certain proteins or other substances may play a role in cancer development. |
Previous Definitions: | ovary, over-the-counter, overactive thyroid, overall survival rate, overdose | Next Definitions: | overgrowth syndrome, overweight, ovulation, OX-40, oxaliplatin |
|
![](https://webarchive.library.unt.edu/eot2008/20081106182025im_/http://www.nci.nih.gov/images/spacer.gif) |