in situ

• POS: Adverb
• HYPHEN: in si=tu

CIDE DICTIONARY

in situ, adv. & adj. [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 Suppl.]
•  In its original position; not extending beyond the place of origin; localized and undisturbed; as, carcinoma in situ.  [PJC]

OXFORD DICTIONARY

in situ, adv.
1 in its place.
2 in its original place.

Etymology

L

ROGET THESAURUS

in situ

Situation

N situation, position, locality, locale, status, latitude and longitude, footing, standing, standpoint, post, stage, aspect, attitude, posture, pose, environment, surroundings (location), circumjacence, place, site, station, seat, venue, whereabouts, ground, bearings, spot, topography, geography, chorography, map, situate, situated, local, topical, topographical, in situ, in loco, here and there, passim, hereabouts, thereabouts, whereabouts, in place, here, there, in such and such surroundings, in such and such environs, in such and such entourage, amidst such and such surroundings, amidst such and such environs, amidst such and such entourage.