Source : Webster's Revised Unabridged Dictionary (1913)

Abortifacient \A*bor`ti*fa"cient\
   ([.a]*b[^o]r`t[i^]*f[=a]"shent), a. [L. abortus (see {Abort},
   v.) + faciens, p. pr. of facere to make.]
   Producing miscarriage. -- n. A drug or an agent that causes
   premature delivery.

Source : WordNet®

abortifacient
     adj : causing abortion
     n : a drug (or other chemical agent) that causes abortion [syn:
         {aborticide}, {abortion-inducing drug}]