n-]
| 1. | agreement; concord; harmony: the concordance of the membership. |
| 2. | an alphabetical index of the principal words of a book, as of the Bible, with a reference to the passage in which each occurs. |
| 3. | an alphabetical index of subjects or topics. |
| 4. | (in genetic studies) the degree of similarity in a pair of twins with respect to the presence or absence of a particular disease or trait. |
concordance con·cor·dance (kən-kôr'dns)
n.
The presence of a given trait in both members of a pair of twins.