A URL which is also a palindrome
which is also a URL which is also a palindrome which is also a URL. A palindromic URL is a URLic palindrome, and vice versa.
An example is the following example:
Another example is my Palindromic Nodeshell, which has probably been deleted and recreated since it is not mine any more, which implies that it has been deleted and recreated since it is not mine any more (read the URL on the status bar of your browser, which status bar contains the URL that you should read).
A palindromic URL is a URL which is also a palindrome, which is also, most of the time, a URL.