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Definition of in vivo in English:

in vivo

adjective

Biology

  • (of a process) performed or taking place in a living organism.

    The opposite of in vitro

    ‘in vivo studies in animals’
    • ‘Resin plates were contaminated in vivo upon intraoral use by 10 volunteers for 7 nights.’
    • ‘An in vivo human bronchial xenograft model system was used to simultaneously analyze electrolyte and fluid transport defects in fully differentiated human cystic fibrosis (CF) and non-CF proximal airways.’

Pronunciation

in vivo

/in ˈvēˌvō/ /ɪn ˈviˌvoʊ/

adverb

Biology

  • In a living organism.

    The opposite of in vitro

    • ‘fluid transport was measured in vivo’

Pronunciation

in vivo

/in ˈvēˌvō/ /ɪn ˈviˌvoʊ/

Origin

Early 20th century Latin, literally ‘in a living thing’.