In situ /(?)/

In si·tu

In situ

adv. & adj.
  1. In its natural or original position or place; in position; -- said specif., in geology, of a rock, soil, or fossil, when in the situation in which it was originally formed or deposited.
  2. In its original position; not extending beyond the place of origin; localized and undisturbed; as, carcinoma in situ. (Med.)