NCI Dictionary of Cancer Terms

  • Resize font
  • Print
  • Email
  • Facebook
  • Twitter
  • Google+
  • Pinterest

The NCI Dictionary of Cancer Terms features 7,863 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

aggravating factor
(A-gruh-VAY-ting FAK-ter)
Something that makes a condition worse. For example, tobacco smoke is an aggravating factor for asthma.