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(proh-LIH-fuh-RAY-tiv ...)
![](https://webarchive.library.unt.edu/eot2008/20090514042315im_/http://www.cancer.gov/images/spacer.gif)
| A measure of the number of cells in a tumor that are dividing (proliferating). May be used with the S-phase fraction to give a more complete understanding of how fast a tumor is growing. |
Previous Definitions: | progression-free survival, progressive disease, prolactin, Proleukin, proliferating | Next Definitions: | prolymphocytic leukemia, Promacta, promegapoietin, ProMune, promyelocytic leukemia |
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