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1875, noun and adjective, from Latin abortus (see abortive) + facientem "making," related to facere "do" (see factitious). An earlier word for this in the noun sense was abortive (1640s).
abortifacient a·bor·ti·fa·cient (ə-bôr'tə-fā'shənt)adj. Causing or inducing abortion.