In` si"tu (?). [L.]
In its natural position or place; -- said of a rock or fossil, when found in the situation in which it was originally formed or deposited.
© Webster 1913
In si"tu (?). [L.]
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.
© Webster 1913