vivo
adj.adj. taking place inside a living body, like a person or an animal, rather than in a lab dish. Scientists use this to describe tests done on real living things.
adj. occurring or performed within a living organism. Often used in scientific contexts to distinguish from experiments conducted in artificial environments; typically follows the preposition 'in'.
The researchers began in vivo testing on mice this week.
While the drug worked well in a test tube, it failed to show the same results during in vivo trials.
The complexity of systemic interactions often means that in vivo observations differ significantly from the simplified models seen in cell cultures.
Usually appears as part of the Latin phrase 'in vivo', which functions as an adjective or adverb. When used as an adjective before a noun, it is sometimes hyphenated.