NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,846 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.

epidural block
(EH-pih-DER-ul blok)
An injection of an anesthetic drug into the space between the wall of the spinal canal and the covering of the spinal cord.