from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A pulp-filled channel in a root of a tooth.
  • n. A treatment in which diseased tissue from this part of the tooth is removed and the resulting cavity is filled with an inert material.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The hollow part of the root of a tooth containing the nerve and blood vessels.
  • n. A surgical operation on a root canal, typically filling it with gutta-percha.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the passage in the root of a tooth through which its nerve and blood vessels enter the pulp cavity


Sorry, no etymologies found.


  • I returned in two weeks for a routine followup check-and got another root canal in my lower right jaw, to take care of the referred pain there.

    Zombie Lover

  • I recalled his anguish whenever he tried to schedule appointments with people who would rather have had a root canal than talk to an insurance agent, as well as the disapproving glances he received from my grandmother, who for most of their marriage made more money than he did.

    The Audacity of Hope


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