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The Collaborative International Dictionary of English v.0.48 (gcide)

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.
[1913 Webster]


Abortive \A*bor"tive\, n.
1. That which is born or brought forth prematurely; an
abortion. [Obs.] --Shak.
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2. A fruitless effort or issue. [Obs.]
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3. (Med.) A medicine to which is attributed the property of
causing abortion; -- also called an {abortifacient}.
--Dunglison.
[1913 Webster PJC]