in situ - definition of in situ by Medical dictionary
in situ [in si´tu] (L.) in its normal place; confined to the site of origin. in si·tu (in sī'tū), In position, not extending beyond the focus or level of origin. [L. in, in, + situs, site] in situ /in si·tu/ (in si´too) [L.] in its normal place; confined ...