As the others have pointed out, yes -lapsarian refers to the fall of humanity for rejecting God (it wasn't just that they ate the fruit; the real issue was that they basically wanted to overthrow God). It's interesting, actually, to see these Biblically-based words and ideas become common, especially today in such a secular world... another great word is 'post- [and pre-] diluvian', meaning after [or before] the Flood.

alexis