Pronunciation: (u-bôr'tiv), [key]
1. failing to succeed; unsuccessful: an abortive rebellion; an abortive scheme.
2. born prematurely.
3. imperfectly developed; rudimentary.
a. producing or intended to produce abortion; abortifacient.
b. acting to halt progress of a disease.
5. Pathol.(of the course of a disease) short and mild without the usual, pronounced clinical symptoms.
6. Bot.(of seeds or pollen grains) imperfect; unable to germinate.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.