Webster's Revised Unabridged Dictionary · 1913

Abortive

Abortive ({not transcribed}) , adjective

[Latin abortivus, from aboriri. See Abort, v.]

1.
Produced by abortion.as, an abortive child. [Rare]
2.
Made from the skin of a still-born animal; as, abortive vellum. [Obsolete]
3.
Rendering fruitless or ineffectual. [Obsolete]
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.
(Biology) Imperfectly formed or developed; rudimentary; sterile; as, an abortive organ, stamen, ovule, etc.
6.
(a) (Medicine) Causing abortion; as, abortive medicines.
(b)
(Medicine) Cutting short the period of an illness; as, abortive treatment of typhoid fever. — Parr

Abortive , noun

1.
That which is born or brought forth prematurely; an abortion. [Obsolete] — Shakespeare
2.
A fruitless effort or issue. [Obsolete]
3.
(Medicine) A medicine to which is attributed the property of causing abortion; -- also called an abortifacient. — Dunglison