1. Theol.the doctrine or dogma that, by the miraculous agency of God, the birth of Christ did not impair or prejudice the virginity of Mary. Cf. Immaculate Conception.
2. Zool.parthenogenesis; parturition by a female who has not copulated.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.