What is a treatment for a screenplay?

Question: What is a treatment for a screenplay!?

also, what is it that the screenplay has but not a treatment!? pls explain!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

a treatment was sort of a novella of the screenplay!. The story put down into prose!.

I believe that treatments aren't used anymore!. Instead the script is read!.Www@QuestionHome@Com