root canal Word Origin noun Dentistry.
- Also called . the root portion of the pulp cavity.
- Informal. .
Origin of root canal First recorded in 1890–95 British Dictionary definitions for root canal root canal noun
- the passage in the root of a tooth through which its nerves and blood vessels enter the pulp cavity
root canal in Medicine root canal n.
- The chamber of the dental pulp lying within the root portion of a tooth.pulp canal
- A treatment in which diseased tissue from this part of the tooth is removed and the resulting cavity is filled with an inert material.