The Collaborative International Dictionary of English v.0.48:
Autogamy \Au*tog"a*my\, n. [Auto- + Gr. ? marriage.] (Bot.) Self-fertilization, the fertilizing pollen being derived from the same blossom as the pistil acted upon. [1913 Webster]WordNet (r) 3.0 (2006):
autogamy n 1: self-fertilization in plants [ant: allogamy]