in vivo

adverb, adjective

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

adverb, adjective

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

Latin; “within a living organism” (see viva).


  1. Within a living organism.

  1. Inside a living organism. Compare in vitro.

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

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