Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

autogamy
     n : self-fertilization in plants [ant: {allogamy}]