Definition of in vivo
: in the living body of a plant or animal
Origin of in vivo
New Latin, literally, in the living
First Known Use: 1901
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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Medical Dictionary: Definition of "in vivo"
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