The Collaborative International Dictionary of English v.0.48:

Seminate \Sem"i*nate\, v. t. [imp. & p. p. Seminated; p. pr. &
   vb. n. Seminating.] [L. seminatus, p. p. of seminare to
   sow, fr. semen, seminis, seed.]
   To sow; to spread; to propagate. [R.] --Waterhouse.
   [1913 Webster]