Source : Webster's Revised Unabridged Dictionary (1913)

Assimilatory \As*sim"i*la*to*ry\, a.
   Tending to assimilate, or produce assimilation; as,
   assimilatory organs.

Source : WordNet®

assimilatory
     adj : tending to or characterized by or causing assimilation
           (being absorbed into or incorporated); "an assimilative
           pattern"; "an assimilative process" [syn: {assimilating},
            {assimilative}]