Pronunciation: (u-bôr'tiv),[key] —adj. 1. failing to succeed; unsuccessful: an abortive rebellion; an abortive scheme. 2. born prematurely.
3. imperfectly developed; rudimentary.
4. Med. 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.