"A court that tries cases in different places within the area under its authority." (CD)
The graph displays the other subjects mentioned on the same pages as the subject "Courts--Circuit Courts". If the same subject occurs on a page with "Courts--Circuit Courts" more than once, it appears closer to "Courts--Circuit Courts" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.