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

Leveraging big data approaches in clinical trials (in vivo) and in cell culture systems (in vitro) coupled with artificial intelligence and machine learning is defining actionable biomarkers to advance development of vaccines that can do more, in line with the recent FDA Modernization Act 2.0. —John Werner, Forbes, 17 Mar. 2025

These therapeutics aim to reprogram T cells in vivo to reduce or eliminate autoreactive T cells that attack the body's own tissues. —Quartz Intelligence Newsroom, Quartz, 13 Mar. 2025

We are told more about the men’s in vitro feelings than we are permitted to see them in vivo. —Jesse Green, New York Times, 6 Mar. 2025

Regrowing a tooth: in vitro and in vivo approaches Journal of Oral Biosciences. —Paul Smaglik, Discover Magazine, 24 Jan. 2025

Word History

Etymology

New Latin, literally, in the living

First Known Use

1901, in the meaning defined above

Rhymes for in vivo

• relievo

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{/qi} by bacteriostatic drugs

—The Journal of the American Medical Association

2

: in a real-life situation

observing a patient's behavior in vivo