What is jQuery (edge) in jsfiddle.net?

Question

In jsfiddle.net if one choose framework as jQuery or Mootools they will get an option for choosing jQuery ( edge ) and Mootools( edge ).

I googled it quite a bit but

Answer 1

An edge build usually refers to some kind of "nightly" or not yet released build. The cutting edge, basically the latest source packaged up.