Discussion What is a Zengohen?

[Rishu]

I didn't really know where to post this so I hope it's alright to ask the question here
I often find manga announcements at magazine websites where a manga is entitled a "Zengohen" (前後編). What is a Zengohen? I can't speak Japanese and I don't have friends who can so I'm usually helping myself with Babelfish. But Babelfish translates it as "front and back compilation" and I don't understand what this could mean either. I know what a "Yomikiri" or "Rensai" is but I really can't find out the meaning of "Zengohen". Can somebody explain it, please?
To show what I mean: in the next Cookie issue there will be a Kirakira 100% "Zengohen". (http://cookie.shueisha.co.jp/yokoku/index.html - you have to scroll down)

 

[Mushashi]

it is the japenese word for an omnibus, the front and back compilation is the series back to back combined to gether, although omnibus is 3, a zengohen can be either 2 or 3 there is no specific limit but it is rare to get a zengohen over 3.

 

[Teaparty]

It means the story is split into 2 or more parts.
Front (前) being part one, and back (後) being the last part.