in situ
adverb or adjective
in si·tu
| \ (ˌ)in-ˈsī-(ˌ)tü
, -ˈsi-, -(ˌ)tyü also -ˈsē-, -(ˌ)chü\
, -ˈsi-, -(ˌ)tyü also -ˈsē-, -(ˌ)chü\
Definition of in situ
: in the natural or original position or place
an in situ cancer confined to the breast duct
Examples of in situ in a Sentence
Recent Examples on the Web
One spoke about nuclear power and nuclear thermal propulsion for spaceflight; one spoke about in situ resource utilization on the Moon and Mars; and one spoke about planetary exploration, the Dragonfly mission to Saturn’s moon Titan in particular. — Marsha Ivins, Time, "I'm a Retired Female Astronaut and I Can't Understand the Obsession With 'Gender Diverse' Space Crews," 28 Aug. 2019 She was diagnosed with ductal carcinoma in situ, the earliest version of breast cancer where abnormal cells are found in milk ducts. — Meredith Cohn, baltimoresun.com, "Patient with terminal cancer sues University of Maryland St. Joseph Medical Center over her care," 28 Aug. 2019 But here's the catch: The mirror would have to be made in situ. — Daniel Clery, Science | AAAS, "Could humanity’s return to the moon spark a new age of lunar telescopes?," 18 July 2019 The science questions the team is tackling really push the frontier of what NASA can do in both remote and in situ optical ocean research. — Chris Ciaccia, Fox News, "The ocean's 'Twilight Zone' is affecting Earth's climate," 15 Aug. 2018 Indeed, precancerous conditions such as ductal carcinoma in situ — abnormal cells in part of the breast that have not spread — can progress to cancer but often don’t, raising questions about how aggressively to treat them. — Quanta Magazine, "Tracking the Evolution of Cancer, Cell by Cell," 13 Nov. 2013 Hang-dogging and bolt-equipped climbs combined to create the discipline of sport climbing—climbing for the physical challenge of it on routes that have been engineered with in situ protection. — Freddie Wilkinson, National Geographic, "Rock climbing: from ancient practice to Olympic sport," 14 Mar. 2019 The precise reasons for this remain a mystery to scientists, who are eager to make in situ measurements of the far side of the Moon. — Eric Berger, Ars Technica, "Here’s why China’s launch to the far side of the Moon is a big deal," 10 Dec. 2018 Watch This 50 People Explain Their State’s Most Popular Stereotypes To view this video please enable JavaScript, and consider upgrading to a web browser that : 0%: 0% Curious to sample China’s own vintages in situ? — Mark Ellwood, Condé Nast Traveler, "Why China Should Be Your Next Wine Destination," 11 Sep. 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'in situ.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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