abortive

Short definition from Wiktionary

Adjective

1. 1
   Produced by abortion; born prematurely and therefore unnatural.
2. 2
   Coming to nothing; failing in its effect. .
3. 3
   Imperfectly formed or developed; rudimentary; sterile.
4. 4
   Causing abortion; abortifacient.
5. 5
   Cutting short; acting to halt or slow the progress (of a disease).
6. 6
   Having a short and mild progression, without pronounced symptoms.
7. 7
   Made from the skin of a still-born animal.

Noun

1. 1
   Someone or something born or brought forth prematurely; an abortion.
2. 2
   A fruitless effort.
3. 3
   A medicine that causes abortion, an abortifacient.
4. 4
   A medicine or treatment acting to halt or slow the progress of a disease.

Verb

1. 1
   To cause an abortion; to render without fruit.