NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,053 terms related to cancer and medicine.
- listen (TEH-loh-meer)
- The ends of a chromosome. Each time a cell divides, the telomeres lose a small amount of DNA and become shorter. Over time, the chromosomes become damaged and the cells die. In cancer cells the telomeres do not get shorter, and may become longer, as the cells divide.