in vivo
adverb or adjective
in vi·vo
in-ˈvē-(ˌ)vō 
-ˈwē-(ˌ)wō
: in the living body of a plant or animal
Examples of in vivo in a Sentence
Recent Examples on the Web
To test the in vivo effect short term the team injected T cell leukemia cells into mice and followed three days later with normal and activated T cells, CAR T cells, or STAb cells.
—
William A. Haseltine, Forbes, 13 Feb. 2023
Parker learned this type of in vivo imaging during a postdoc as a Pfizer employee doing research at Stanford University with Mark Schnitzer, a biophysicist who pioneered the method to study neurons more generally.
—WIRED, 7 Aug. 2023
Intellia is one of the leading companies working to advance in vivo gene editing therapies.
—Megan Molteni, STAT, 21 Aug. 2023
This underlying problem of access may require other improved technologies such as the use of mRNA to modify cells in vivo, as well.
—William A. Haseltine, Forbes, 23 Feb. 2023
The study was conducted in vitro and is not comparable to in vivo research, Urrialde said.
—Carla Delgado, Verywell Health, 5 July 2023
Enhanced evaluation of selective androgen receptor modulators in vivo.
—The Salt Lake Tribune, 25 July 2023
To find out whether dog hookworms are resistant to any of these drugs, Kaplan began a series of laborious in vitro and in vivo tests on hookworm samples from three dogs with stubborn infections, including one greyhound named Worthy.
—Bradley Van Paridon, Scientific American, 1 June 2023
Novartis has recognized the importance of this and is working with the Bill & Melinda Gates Foundation on an ambitious project to deliver gene medicines in vivo — or directly into the body — instead of via the current complex ex vivo process.
—Jayasree K. Iyer, STAT, 12 July 2023
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William A. Haseltine, Forbes, 13 Feb. 2023
Parker learned this type of in vivo imaging during a postdoc as a Pfizer employee doing research at Stanford University with Mark Schnitzer, a biophysicist who pioneered the method to study neurons more generally.
—WIRED, 7 Aug. 2023
Intellia is one of the leading companies working to advance in vivo gene editing therapies.
—Megan Molteni, STAT, 21 Aug. 2023
This underlying problem of access may require other improved technologies such as the use of mRNA to modify cells in vivo, as well.
—William A. Haseltine, Forbes, 23 Feb. 2023
The study was conducted in vitro and is not comparable to in vivo research, Urrialde said.
—Carla Delgado, Verywell Health, 5 July 2023
Enhanced evaluation of selective androgen receptor modulators in vivo.
—The Salt Lake Tribune, 25 July 2023
To find out whether dog hookworms are resistant to any of these drugs, Kaplan began a series of laborious in vitro and in vivo tests on hookworm samples from three dogs with stubborn infections, including one greyhound named Worthy.
—Bradley Van Paridon, Scientific American, 1 June 2023
Novartis has recognized the importance of this and is working with the Bill & Melinda Gates Foundation on an ambitious project to deliver gene medicines in vivo — or directly into the body — instead of via the current complex ex vivo process.
—Jayasree K. Iyer, STAT, 12 July 2023
See More
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'in vivo.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
Etymology
New Latin, literally, in the living
First Known Use
1901, in the meaning defined above
Dictionary Entries Near in vivo
Cite this Entry
“In vivo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%20vivo. Accessed 9 Dec. 2023.
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Kids Definition
in vivo
adverb or adjective
in vi·vo
in-ˈvē-(ˌ)vō
-ˈwē-(ˌ)wō
: inside the living body of a plant or animal
in vivo activity
Etymology
Latin, literally, "in the living"
Medical Definition
in vivo
adverb or adjective
in vi·vo
in-ˈvē-(ˌ)vō
1
: in the living body of a plant or animal
in vivo synthesis of DNA
microorganisms are not ordinarily destroyed in vivo by bacteriostatic drugs—Journal of the American Medical Association
Journal of the American Medical Association2
: in a real-life situation
observing a patient's behavior in vivo
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