What does abortive mean?
The definition of abortive
A*bor”tive, a.
Etym: [L. abortivus, fr. aboriri. See Abort, v.]

1 Produced by abortion; born prematurely; 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.” Milton.
4 Coming to naught; failing in its effect; miscarrying; fruitless; unsuccessful; as, an abortive attempt. “An abortive enterprise.” Prescott.
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; as, abortive treatment of typhoid fever.

A*bor”tive, n.
1 That which is born or brought forth prematurely; an abortion. [Obs.] Shak.
2 A fruitless effort or issue. [Obs.]
3 A medicine to which is attributed the property of causing abortion. Dunglison.