Cancer Glossaries

Cancer Glossaries

Cancer terms may sometimes be difficult to understand. You may hear your doctor, nurse, social worker or child life specialist use certain medical terms, and you may not know what they mean. It is important to understand these terms, so you can make the best informed decision about your cancer treatment.

The websites on the right offer medical dictionaries which define common medical terms. The information provided on these sites is not intended to substitute the information provided by your doctor. Always consult your doctor for more information. kidsSTRONG does not control or endorse the information offered by these sites, but provides these links as an educational resource to kidsSTRONG visitors.

National Cancer Institute's Dictionary of Cancer Terms

This dictionary contains more than 6,000 terms related to cancer and medicine.

Diccionario de cáncer

Un recurso con más de 6.000 términos relacionados con el cáncer y la medicina.


A four-part series of articles designed to help people with cancer understand commonly used medical terms from the American Society of Clinical Oncology. The articles will address terms used throughout the cancer experience, from a new diagnosis to during and after treatment.Read the four-part feature series on oncology terms.

medline plus

Medline Plus is a service of the U.S. Library of Medicine and National Institutes of Health. Their online medical dictionary uses the Merriam-Webster medical dictionary, and includes pronunciation along with definitions.

Talking Glossary of Genetic Terms

The Talking Glossary lists more than 200 terms to help people understand terms used in genetic research.

MedTerms™ online medical dictionary is the medical reference for, containing easy-to-understand explanations of over 16,000 medical terms.