/ Dictionary / Index A abortus: Meaning and Definition of Find definitions for: a•bor•tus Pronunciation: (u-bôr'tus), [key] — pl. -tus•es. a miscarriage. immature placental or fetal tissue prematurely passed or curetted. an aborted fetus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: abortus (Thesaurus) abortive ABO system Related Content Daily Word Quiz: verbose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language