Source : Webster's Revised Unabridged Dictionary (1913)

Seeder \Seed"er\, n.
   One who, or that which, sows or plants seed.

Source : WordNet®

seeder
     n 1: a person who seeds clouds [syn: {cloud seeder}]
     2: a mechanical device that sows grass seed or grain evenly
        over the ground
     3: a kitchen utensil that removes seeds from fruit