a. [ L. abortivus, fr. aboriri. See Abort, v. ] 1. Produced by abortion.as, an abortive child. [ R. ] [ 1913 Webster + AS ]

2. Made from the skin of a still-born animal; as, abortive vellum. [ Obs. ] [ 1913 Webster ]

3. Rendering fruitless or ineffectual. [ Obs. ] “Plunged in that abortive gulf.” Milton. [ 1913 Webster ]

4. Coming to naught; failing in its effect; miscarrying; fruitless; unsuccessful; as, an abortive attempt. “An abortive enterprise.” Prescott. [ 1913 Webster ]

5. (Biol.) Imperfectly formed or developed; rudimentary; sterile; as, an abortive organ, stamen, ovule, etc. AS [ 1913 Webster ]

6. (Med.) (a) Causing abortion; as, abortive medicines. Parr. AS (b) Cutting short the period of an illness; as, abortive treatment of typhoid fever. [ 1913 Webster + AS ]

n. 1. That which is born or brought forth prematurely; an abortion. [ Obs. ] Shak. [ 1913 Webster ]

2. A fruitless effort or issue. [ Obs. ] [ 1913 Webster ]

3. (Med.) A medicine to which is attributed the property of causing abortion; -- also called an abortifacient. Dunglison. [ 1913 Webster +PJC ]

adv. In an abortive or untimely manner; immaturely; fruitlessly. [ 1913 Webster ]

n. The quality of being abortive. [ 1913 Webster ]