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Definition of "tumor" []

  • An abnormal growth of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function; a neoplasm. (noun)
  • A swollen part; a swelling. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "tumor" in a sentence
  • "Kennedy, now fighting an aggressive and deadly type of brain tumor, is one of Congress 'most prolific legislators."
  • "Is he the ONLY person who thinks that a brain tumor is heartbreaking news?"
  • ""Over the past several days, Vicki and I, along with my outstanding team of doctors at Massachusetts General Hospital, have consulted with experts from around the country and have decided that the best course of action for my brain tumor is targeted surgery followed by chemotherapy and radiation," the senator said in a statement."