The way that I've seen this term used is when referring to some sort of complex data structure of arbitrary size. You see this a lot in the JLS as there is much discussion of data structures. From the JLS,
§8.4.1 Formal Parameters:
FormalParameterList:
FormalParameter
FormalParameterList , FormalParameter
In this case, we're defining a FormalParameterList in terms of itself. This allows us to easily describe something of arbitrary length. I used google and also came up with
this site that discusses the topic.
There may very well be other contexts for this term and it might be helpful if you could provide us with the context from which you found the term so we know how it is being used. Jess' answer could very well be more appropriate for your context than this one.
I hope that helps,
Corey
[ June 05, 2002: Message edited by: Corey McGlone ]