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In vivo

/in ˈvēvō/

Adjective or Adverb

1. Experimentation using a whole, living organism as opposed to a partial or dead organism, or an in vitro (“within the glass”, i.e., in a test tube or petri dish) controlled environment. (

2. Within a living organism. (

3. Of a biological process occurring within a living organism. (

4. In the living body of a plant or animal. (

Word origin: Latin; “within a living organism.”

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