• (a.) Pertaining to abortion; miscarrying; abortive.
A·bor'tion·al adjective Pertaining to abortion; miscarrying; abortive. Carlyle. 
abortion, abortional 1. Expulsion of a fetus from the womb before it is viable; however, medical personnel will also use this term for a miscarriage, which is involuntary, calling it a 'spontaneous abortion'. 2. Induced termination of pregnancy before the fetus is capable of independent survival. 3. Anything that fails to develop, progress, or ma...