The Collaborative International Dictionary of English v.0.48:

Insemination \In*sem`i*na"tion\, n.
   A sowing. [Obs.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

insemination
    n 1: the act of sowing (of seeds in the ground or, figuratively,
         of germs in the body or ideas in the mind, etc.)
    2: the introduction of semen into the genital tract of a female

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "insemination":
   artificial insemination, broadcast, broadcasting, conjugation,
   cross-fertilization, cross-pollination, dissemination, fecundation,
   fertilization, getting with child, heterogamy, impregnation,
   isogamy, orthogamy, planting, pollination, pollinization,
   reforestation, resetting, retimbering, seeding, semination,
   setting, sowing, transplantation, zygosis