From Longman Dictionary of Contemporary Englishin vitro fertilizationin vi‧tro fer‧ti‧li‧za‧tion /ɪn ˌviːtrəʊ fɜːtəlaɪˈzeɪʃən $ -troʊ fɜːrtələ-/ noun [uncountable] technical HBHMa process in which a human egg is fertilized outside a woman’s body → test-tube baby
Examples from the Corpus
in vitro fertilization• We have already seen in vitro fertilization of both a panda and a gorilla.Origin in vitro fertilization (1900-2000) Latin in vitro “in glass” 