a·bor·tive /əˈbɔrtɪv/ 形容詞
  發育不全的, 流產的, 墮胎的, 失敗的
  a·bor·tive /əˈbɔrtɪv/ 名詞
  墮胎藥
  A·bor·tive a.
  1. Produced by abortion.as, an abortive child. [R.]
  2. Made from the skin of a still-born animal; as, abortive vellum. [Obs.]
  3. Rendering fruitless or ineffectual. [Obs.] “Plunged in that abortive gulf.”
  4. Coming to naught; failing in its effect; miscarrying; fruitless; unsuccessful; as, an abortive attempt. “An abortive enterprise.”
  5. Biol. Imperfectly formed or developed; rudimentary; sterile; as, an abortive organ, stamen, ovule, etc.
  6. Med. (a) Causing abortion; as, abortive medicines. --Parr.   (b) Cutting short the period of an illness; as, abortive treatment of typhoid fever.
  A·bor·tive, n.
  1. That which is born or brought forth prematurely; an abortion. [Obs.]
  2. A fruitless effort or issue. [Obs.]
  3. Med.  A medicine to which is attributed the property of causing abortion; -- also called an abortifacient.
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  abortive
       adj : failing to accomplish an intended result; "an abortive
             revolt"; "a stillborn plot to assassinate the
             President" [syn: stillborn, unsuccessful]