abortive

1.	failing to succeed; unsuccessful: an abortive rebellion; an abortive scheme.

2.	born prematurely.

3.	imperfectly developed; rudimentary.

4.	Medicine/Medical. a. producing or intended to produce abortion; abortifacient. b. acting to halt progress of a disease.

5.	Pathology. (of the course of a disease) short and mild without the usual, pronounced clinical symptoms.

6.	Botany. (of seeds or pollen grains) imperfect; unable to germinate.