in vivo

adverb or adjective in vi·vo \ in-ˈvē-(ˌ)vō , -ˈwē-(ˌ)wō \
Updated on: 10 Apr 2018

Definition of in vivo

: in the living body of a plant or animal

Recent Examples of in vivo from the Web

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.

Origin and Etymology of in vivo

New Latin, literally, in the living


Medical Dictionary

in vivo

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

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 drugs
  • Journal of the American Medical Association
2 : in a real-life situation
  • observing a patient's behavior in vivo

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