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
Regrowing a tooth: in vitro and in vivo approaches
Journal of Oral Biosciences.
—
Paul Smaglik, Discover Magazine, 24 Jan. 2025
Working with David Liu, Sam Berns’ mom, and Leslie Gordon of the Progeria Research Foundation, my research group has already shown that a single intravenous infusion of an in vivo gene editor can dramatically extend the life of mice that have been engineered to carry the human progeria mutation.
—Francis Collins, WIRED, 7 Jan. 2025
Several different miniature microscopes designed for in vivo experiments in animals exist.
—IEEE Spectrum, 13 Oct. 2024
Sana continues to focus on developing its ex vivo and in vivo cell engineering platforms and advancing its pipeline of product candidates.
—Quartz Bot, Quartz, 8 Nov. 2024
See All Example Sentences for in vivo
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Paul Smaglik, Discover Magazine, 24 Jan. 2025
Working with David Liu, Sam Berns’ mom, and Leslie Gordon of the Progeria Research Foundation, my research group has already shown that a single intravenous infusion of an in vivo gene editor can dramatically extend the life of mice that have been engineered to carry the human progeria mutation.
—Francis Collins, WIRED, 7 Jan. 2025
Several different miniature microscopes designed for in vivo experiments in animals exist.
—IEEE Spectrum, 13 Oct. 2024
Sana continues to focus on developing its ex vivo and in vivo cell engineering platforms and advancing its pipeline of product candidates.
—Quartz Bot, Quartz, 8 Nov. 2024
See All Example Sentences for in vivo
Cite this Entry
“In vivo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%20vivo. Accessed 1 Mar. 2025.
Copy CitationKids 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{/qi} by bacteriostatic drugs—The Journal of the American Medical Association
The Journal of the American Medical Association2
: in a real-life situation
observing a patient's behavior in vivo
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