in vivo

adverb or adjective

in vi·​vo in-ˈvē-(ˌ)vō How to pronounce in vivo (audio)
-ˈwē-(ˌ)wō
: in the living body of a plant or animal

Examples of in vivo in a Sentence

Recent Examples on the Web The combination was developed because the effects in vivo were better than the single molecules alone. Alex Zhavoronkov, Forbes, 29 Feb. 2024 What’s more, the Stanford team used a machine learning algorithm to show that the effects seen in their in vitro experiments also seem to be occurring in living cells (that is, in vivo). Philip Ball, Quanta Magazine, 14 Feb. 2024 Researchers and clinicians can use it to measure oxygen saturation in vivo and identify intracellular proteins associated with specific diseases. William A. Haseltine, Forbes, 15 Feb. 2024 New technologies allowing in vivo delivery of gene-editing therapies and improved manufacturing will be key to driving prices down, as will unique partnerships between universities, government, and industry, brought together with affordability as a common goal. Jennifer Doudna, WIRED, 8 Jan. 2024 Feinberg added that once this technology is tested in vivo, or in the body, there might be some regulatory hurdles with the biomaterials being used and how it could be regulated by the Food and Drug Administration. Deborah Balthazar, STAT, 7 Dec. 2023 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

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

Time Traveler
The first known use of in vivo was in 1901

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 28 Mar. 2024.

Kids Definition

in vivo

adverb or adjective
in vi·​vo in-ˈvē-(ˌ)vō How to pronounce in vivo (audio)
-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 How to pronounce in vivo (audio)
1
: in the living body of a plant or animal
in vivo synthesis of DNA
microorganisms are not ordinarily destroyed in vivo by bacteriostatic drugsJournal of the American Medical Association
2
: in a real-life situation
observing a patient's behavior in vivo
Last Updated: - Updated example sentences
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