Definition of in vitro in English:

in vitro

Line breaks: in vitro
Pronunciation: /ɪn ˈviːtrəʊ

adjective& adverb

(Of a process) performed or taking place in a test tube, culture dish, or elsewhere outside a living organism: [as adjective]: in vitro fertilization [as adverb]: the parasites could not be grown in vitro The opposite of in vivo.
More example sentences
  • In vitro expression of protein is used in functional genomics as a bridge between traditional genomics and proteomics.
  • In vitro fertilization, or IVF, has helped thousands of couples achieve pregnancy.


late 19th century: Latin, literally 'in glass'.

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