root canal root borer • root cap · · · Info · Definitions · Characters · · root canal · · Text Common · · Latin · · Scripts 10 · · Length 3 · · Syllables Definitions · · · (noun) the passage in the root of a tooth through which its nerve and blood vessels enter the pulp cavity. Synonyms: root canal. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074