I am sorry for busting in on this thread, but I need help and I don't know where to turn. Perhaps someone here can direct me to the proper place. I need a word:

Prediction implies the future. Is there a word to describe a theory (scientific) that makes predictions about the past. If I have a set of observations, my theory can't be said to "predict" these past observations, even though it does explain them. Postdict?
Thank you in advance.