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.