in vivo

adverb or adjective
in vi·​vo | \ in-ˈvē-(ˌ)vō How to pronounce in vivo (audio) , -ˈwē-(ˌ)wō \

Definition of in vivo

: in the living body of a plant or animal

Examples of in vivo in a Sentence

Recent Examples on the Web Manuel Serrano of IRB Barcelona started the day with a talk on understanding and manipulating in vivo reprogramming and its effects on aging. Alex Zhavoronkov, Forbes, 29 June 2022 While some in-vitro data supported the claim that fluvoxamine’s mechanisms of action could work against SARS-CoV-2, no in vivo animal or human studies have been conducted to confirm this hypothesis. William A. Haseltine, Forbes, 19 May 2022 Many questions about the birds’ magnetic compass remain, including whether the magnetic field effects on robin Cry4a observed in vitro also exist in vivo. Henrik Mouritsen, Scientific American, 1 Apr. 2022 The team used a combination of techniques for their study to gather critical data on airflow, muscle activation, and rib motion in vivo. Jennifer Ouellette, Ars Technica, 24 Mar. 2022 Mammoth will receive upfront payments of $41 million for the deal, which will make use of its gene-editing Crispr tools to develop in vivo gene therapies for two genetic diseases. Robert Hart, Forbes, 26 Oct. 2021 Now, the company is putting greater emphasis on using its technology for in vivo (in a living organism) therapies. John Cumbers, Forbes, 27 Sep. 2021 To target these areas, Mammoth is focusing on two proteins — Cas14 and Casɸ — which could be particularly helpful for in vivo gene editing because of their ultra-small size. Katie Jennings, Forbes, 9 Sep. 2021 This is known as in vivo therapy, where the editing tools can be administered directly into the body, compared to ex vivo editing, where cells are removed from the patient, treated and returned back into the body. Katie Jennings, Forbes, 9 Sep. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'in vivo.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of in vivo

1901, in the meaning defined above

History and Etymology for in vivo

New Latin, literally, in the living

Learn More About in vivo

Time Traveler for in vivo

Time Traveler

The first known use of in vivo was in 1901

See more words from the same year

Dictionary Entries Near in vivo

in vitro fertilization

in vivo


See More Nearby Entries 

Statistics for in vivo

Last Updated

3 Aug 2022

Cite this Entry

“In vivo.” Dictionary, Merriam-Webster, Accessed 17 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for in vivo

in vivo

adverb or adjective
in vi·​vo | \ in-ˈvē-(ˌ)vō How to pronounce in vivo (audio) \

Medical Definition of in vivo

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


Test Your Vocabulary

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!