abortifacient Syllabification: (a·bor·ti·fa·cient)Pronunciation: /əˌbôrtəˈfāSHənt/ MedicineDefinition of abortifacient adjective (chiefly of a drug) causing abortion. noun an abortifacient drug. abortifacient in other Oxford dictionaries Definition of abortifacient in the British & World English dictionary