The Collaborative International Dictionary of English v.0.48:

Assimulate \As*sim"u*late\, v. t. [L. assimulatus, p. p. of
   assimulare, equiv. to assimilare. See Assimilate, v. t.]
   1. To feign; to counterfeit; to simulate; to resemble. [Obs.]
      --Blount.
      [1913 Webster]

   2. To assimilate. [Obs.] --Sir M. Hale.
      [1913 Webster]