Closures are sometimes called "inside out objects."

Hmm, interesting. I've always associated the term "inside out objects" specifically with the technique of using closures as the implementation of an object's storage, instead of storing data directly in the object (as described ably in Re: Tutorial: Introduction to Object-Oriented Programming).

But your usage of the term certainly makes sense, and seems more generally applicable. Now I wonder which one came first? I have a feeling it's the more general definition, but I'm curious if anybody out there knows for sure?