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in vivo

American  
[in vee-voh] / ɪn ˈvi voʊ /

adverb

  1. (of a biological process) occurring or made to occur within a living organism or natural setting.

in vivo British  
/ ɪn ˈviːvəʊ /

adverb

  1. (of biological processes or experiments) occurring or carried out in the living organism

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
in vivo Scientific  
/ ĭnvē′vō /

  1. Inside a living organism.

  2. Compare in vitro

in vivo Cultural  

  1. In nature; literally, “in life.” In vivo conditions are distinguished from those that might exist only in a laboratory. (Compare in vitro.)

Etymology

Origin of in vivo

First recorded in 1900–05; from Latin in vīvō “in (something) alive”

Compare meaning

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The company website shows Lilly is currently hiring for roles in its research division relating to in vivo pharmacology.

From Barron's

The approach, known as in vivo CAR-T therapy, engineers a patient’s own immune cells to fight diseases inside the body.

From Barron's

Future studies will focus on testing the biological effects of the newly discovered trace diterpenes and evaluating their safety and effectiveness in vivo.

From Science Daily

But a new generation of biotech companies is making gene therapy more accessible through in vivo approaches, in which lentiviral vectors deliver genetic instructions directly inside the body.

From The Wall Street Journal

First, they carefully recreated the TCR's in vivo membrane environment using the right lipid mixture.

From Science Daily

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.