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[see-too] /ˈsi tu/
noun, Latin.

in situ

[in sahy-too, -tyoo, see-; Latin in sit-oo] /ɪn ˈsaɪ tu, -tyu, ˈsi-; Latin ɪn ˈsɪt u/
adverb, adjective
situated in the original, natural, or existing place or position:
The archaeologists were able to date the vase because it was found in situ.
  1. in place or position; undisturbed.
  2. (especially of a malignant tumor) in a localized state or condition:
    carcinoma in situ.
Origin of in situ
First recorded in 1730-40, in situ is from the Latin word in sitū literally, in place Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for situ

in situ

/ɪn ˈsɪtjuː/
adverb, adjective (postpositive)
in the natural, original, or appropriate position
(pathol) (esp of a cancerous growth or tumour) not seen to be spreading from a localized position
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for situ

see in situ.

in situ

Latin, literally "in its (original) place or position" (see situate (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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situ in Medicine

in situ in si·tu (ĭn sī'tōō)

  1. In the original position.

  2. Confined to the site of origin.

in situ adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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situ in Culture
in situ [(in seye-tooh, in sit-ooh)]

In the original place or arrangement: “The body was left in situ until the police arrived.” From Latin, meaning “in position.”

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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