One website I find useful and sometimes visit just for interest or “fun” is dictionary.com. I keep the link in my toolbar because I often need to check the meaning or pronunciation of a word. The audio pronunciation function is a particularly useful feature. Sometimes, though, I go to check the meaning of the word and find this:

http://dictionary.reference.com/browse/epexegetical

Annoying!

In this case I know what the word means in a periphrastic (use the dictionary!) kind of way, but wanted a clear, concise definition. What I got was the word as its own definition. As I said: Annoying!

At least with “periphrastic,”

a) I get a sufficient definition, and
b) there is an example to illuminate the use of the term.

But – fun with words – click on the definition where it says “like an epexegesis” and, Bazinga!, a better definition of sorts shows up.