Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

in vivo

play
adverb or adjective in vi·vo \in-ˈvē-(ˌ)vō, -ˈwē-(ˌ)wō\

Definition of in vivo

  1. :  in the living body of a plant or animal



Origin of in vivo

New Latin, literally, in the living


First Known Use: 1901


Medical Dictionary

in vivo

play
adverb or adjective in vi·vo \in-ˈvē-(ˌ)vō\

Medical Definition of in vivo

  1. 1:  in the living body of a plant or animal <in vivo synthesis of DNA> <microorganisms are not ordinarily destroyed in vivo by bacteriostatic drugs—Journal of the American Medical Association>

  2. 2:  in a real-life situation <observing a patient's behavior in vivo>




Learn More about in vivo

  1. Medical Dictionary: Definition of "in vivo"


Seen and Heard

What made you want to look up in vivo? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a timid, meek, or unassertive person

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe reduce perplex disapprove
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ