Why turkey has the same name as Turkey
diameter di·am·e·ter (dī-ām'ĭ-tər)
A straight line connecting two opposite points on the surface of a spherical or cylindrical body, or at the boundary of an opening or foramen, passing through the center of such body or opening.
The distance measured along such a line.
The diameter of a graph is the maximum value of the minimum distance between any two nodes.