The Collaborative International Dictionary of English v.0.48:

in-situ \in-situ\ adj.
   being in the original position; not having been moved or
   transferred to another location; as, an in-situ investigator.

   Syn: unmoved.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

in-situ
    adj 1: being in the original position; not having been moved;
           "the archeologists could date the vase because it was in-
           situ"; "an in-situ investigator" [syn: in-situ,
           unmoved]