n. [ Auto- + fecundation. ] (Biol.) Self-impregnation. Darwin. [ 1913 Webster ]
n. [ Cf. F. fécondation. ] (Biol.) The act by which, either in animals or plants, material prepared by the generative organs the female organism is brought in contact with matter from the organs of the male, so that a new organism results; impregnation; fertilization. [ 1913 Webster ]
n. (Physiol.) A term collectively applied to the changes or conditions preceding fecundation, especially to the changes which the ovum undergoes before fecundation. [ 1913 Webster ]
n. (Physiol.) Fertilization of two ova, at the same menstruation, by two different acts of coition. [ 1913 Webster ]